diff --git a/.eslintrc.js b/.eslintrc.js
index d3cf5cb..e3020c5 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -6,37 +6,75 @@ const config = {
     node: true,
   },
   "extends": [
-    "airbnb-base",
+    "eslint:recommended",
     "prettier"
   ],
   "plugins": [
     "prettier"
   ],
   "rules": {
-    "prettier/prettier": [
-      "error",
-      {
-        "bracketSpacing": true,
-        "semi": false,
-        "singleQuote": true,
-        "trailingComma": "es5"
-      }
-    ],
     "no-confusing-arrow": "off",
     "comma-dangle": ["error", {
-        "arrays": "always-multiline",
-        "objects": "always-multiline",
-        "imports": "always-multiline",
-        "exports": "always-multiline",
-        "functions": "never"
+      "arrays": "always-multiline",
+      "objects": "always-multiline",
+      "imports": "always-multiline",
+      "exports": "always-multiline",
+      "functions": "never"
     }]
   },
   overrides: [
+    {
+      files: ['lib/**/*'],
+      env: {
+        es6: true,
+      },
+      parserOptions: {
+        sourceType: 'module',
+      },
+    },
+    {
+      files: ['test/**/*'] ,
+      env: {
+        mocha: true
+      },
+      parserOptions: {
+        sourceType: 'module',
+      },
+      rules: {
+        "no-unused-expressions": 0
+      }
+    },
+    {
+      files: ['**/*.@(ts|tsx)'],
+      parser: '@typescript-eslint/parser',
+      plugins: ['@typescript-eslint'],
+      parserOptions: {
+        sourceType: 'module',
+      },
+      rules: {
+        'no-undef': 'off',
+        'no-unused-vars': 'off',
+        '@typescript-eslint/class-name-casing': 'error',
+        '@typescript-eslint/consistent-type-assertions': 'error',
+        '@typescript-eslint/no-empty-interface': 'error',
+        '@typescript-eslint/no-non-null-assertion': 'error',
+        '@typescript-eslint/type-annotation-spacing': 'error',
+        '@typescript-eslint/no-unused-vars': [
+          'error',
+          {
+            argsIgnorePattern: '^_',
+            ignoreRestSiblings: true,
+          },
+        ],
+      },
+    },
     {
       files: ['**/*.d.ts'],
       rules: {
-        strict: 'off',
+        '@typescript-eslint/no-useless-constructor': 'error',
         'no-var': 'off',
+        'no-useless-constructor': 'off',
+        strict: 'off',
       },
     },
   ]
diff --git a/.prettierignore b/.prettierignore
new file mode 100644
index 0000000..30117ea
--- /dev/null
+++ b/.prettierignore
@@ -0,0 +1,4 @@
+package.json
+node_modules
+dist
+coverage
diff --git a/babel.config.js b/babel.config.js
index 7a01cf0..7228df3 100644
--- a/babel.config.js
+++ b/babel.config.js
@@ -11,6 +11,7 @@ module.exports = (api) => {
           },
         },
       ],
+      '@babel/preset-typescript',
     ],
   }
 }
diff --git a/lib/.eslintrc.js b/lib/.eslintrc.js
deleted file mode 100644
index ec9f788..0000000
--- a/lib/.eslintrc.js
+++ /dev/null
@@ -1,13 +0,0 @@
-module.exports = {
-  "extends": require.resolve("../.eslintrc"),
-  env: {
-    es6: true,
-  },
-  "rules": {
-    "new-cap": [2, {
-      "capIsNewExceptions": [
-        "Suite"
-      ]
-    }],
-  }
-}
diff --git a/package.json b/package.json
index 51c9ac8..96ec375 100644
--- a/package.json
+++ b/package.json
@@ -40,17 +40,20 @@
     "@babel/core": "^7.7.0",
     "@babel/plugin-proposal-object-rest-spread": "^7.6.2",
     "@babel/preset-env": "^7.7.1",
+    "@babel/preset-typescript": "^7.9.0",
     "@babel/register": "^7.7.0",
     "@types/chai": "^4.1.7",
     "@types/lodash": "^4.14.119",
     "@types/mocha": "^7.0.1",
     "@types/node": "^13.9.8",
+    "@typescript-eslint/eslint-plugin": "^2.26.0",
+    "@typescript-eslint/parser": "^2.26.0",
     "benchmark": "^2.1.4",
     "chai": "^4.2.0",
     "dtslint": "^3.4.1",
     "eslint": "^6.8.0",
-    "eslint-config-airbnb-base": "^14.1.0",
-    "eslint-config-prettier": "^6.3.0",
+    "eslint-config-prettier": "^6.10.1",
+    "eslint-plugin-expect-type": "^0.0.4",
     "eslint-plugin-import": "^2.20.2",
     "eslint-plugin-prettier": "^3.1.2",
     "microbundle": "^0.11.0",
diff --git a/prettier.config.js b/prettier.config.js
new file mode 100644
index 0000000..57c4142
--- /dev/null
+++ b/prettier.config.js
@@ -0,0 +1,12 @@
+'use strict'
+
+module.exports = {
+  endOfLine: 'lf',
+  semi: false,
+  singleQuote: true,
+  tabWidth: 2,
+  trailingComma: 'es5',
+  bracketSpacing: false,
+
+  proseWrap: 'always',
+}
diff --git a/test/.eslintrc.js b/test/.eslintrc.js
deleted file mode 100644
index 2a929ee..0000000
--- a/test/.eslintrc.js
+++ /dev/null
@@ -1,8 +0,0 @@
-module.exports = {
-  "env": {
-    "mocha": true
-  },
-  "rules": {
-    "no-unused-expressions": 0
-  }
-}
diff --git a/types/tests.ts b/types/tests.ts
index 0fb940d..711c9a8 100644
--- a/types/tests.ts
+++ b/types/tests.ts
@@ -39,7 +39,7 @@ u.ifElse(false, "foo", 3, { a: 3 }); // $ExpectType 3
 u.ifElse(true, "foo", 3, { a: 3 }); // $ExpectType "foo"
 
 // *** map ***
-const inc = (i:number) => i+1;
+const inc = (i: number) => i+1;
 
 u.map(inc, [1,2,3]); // $ExpectType number[]
 u.map(inc, ["potato"]); // $ExpectType number[]
diff --git a/yarn.lock b/yarn.lock
index a3903c0..5f1c28f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -76,7 +76,7 @@
     levenary "^1.1.1"
     semver "^5.5.0"
 
-"@babel/helper-create-class-features-plugin@^7.2.1":
+"@babel/helper-create-class-features-plugin@^7.2.1", "@babel/helper-create-class-features-plugin@^7.8.3":
   version "7.8.6"
   resolved "https://registry.yarnpkg.com/@babel/helper-create-class-features-plugin/-/helper-create-class-features-plugin-7.8.6.tgz#243a5b46e2f8f0f674dc1387631eb6b28b851de0"
   integrity sha512-klTBDdsr+VFFqaDHm5rR69OpEQtO2Qv8ECxHS1mNhJJvaHArR6a1xTf5K/eZW7eZpJbhCx3NW1Yt/sKsLXLblg==
@@ -408,6 +408,13 @@
   dependencies:
     "@babel/helper-plugin-utils" "^7.8.3"
 
+"@babel/plugin-syntax-typescript@^7.8.3":
+  version "7.8.3"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-typescript/-/plugin-syntax-typescript-7.8.3.tgz#c1f659dda97711a569cef75275f7e15dcaa6cabc"
+  integrity sha512-GO1MQ/SGGGoiEXY0e0bSpHimJvxqB7lktLLIq2pv8xG7WZ8IMEle74jIe1FhprHBWjwjZtXHkycDLZXIWM5Wfg==
+  dependencies:
+    "@babel/helper-plugin-utils" "^7.8.3"
+
 "@babel/plugin-transform-arrow-functions@^7.8.3":
   version "7.8.3"
   resolved "https://registry.yarnpkg.com/@babel/plugin-transform-arrow-functions/-/plugin-transform-arrow-functions-7.8.3.tgz#82776c2ed0cd9e1a49956daeb896024c9473b8b6"
@@ -644,6 +651,15 @@
   dependencies:
     "@babel/helper-plugin-utils" "^7.8.3"
 
+"@babel/plugin-transform-typescript@^7.9.0":
+  version "7.9.4"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-typescript/-/plugin-transform-typescript-7.9.4.tgz#4bb4dde4f10bbf2d787fce9707fb09b483e33359"
+  integrity sha512-yeWeUkKx2auDbSxRe8MusAG+n4m9BFY/v+lPjmQDgOFX5qnySkUY5oXzkp6FwPdsYqnKay6lorXYdC0n3bZO7w==
+  dependencies:
+    "@babel/helper-create-class-features-plugin" "^7.8.3"
+    "@babel/helper-plugin-utils" "^7.8.3"
+    "@babel/plugin-syntax-typescript" "^7.8.3"
+
 "@babel/plugin-transform-unicode-regex@^7.8.3":
   version "7.8.3"
   resolved "https://registry.yarnpkg.com/@babel/plugin-transform-unicode-regex/-/plugin-transform-unicode-regex-7.8.3.tgz#0cef36e3ba73e5c57273effb182f46b91a1ecaad"
@@ -737,6 +753,14 @@
     "@babel/types" "^7.4.4"
     esutils "^2.0.2"
 
+"@babel/preset-typescript@^7.9.0":
+  version "7.9.0"
+  resolved "https://registry.yarnpkg.com/@babel/preset-typescript/-/preset-typescript-7.9.0.tgz#87705a72b1f0d59df21c179f7c3d2ef4b16ce192"
+  integrity sha512-S4cueFnGrIbvYJgwsVFKdvOmpiL0XGw9MFW9D0vgRys5g36PBhZRL8NX8Gr2akz8XRtzq6HuDXPD/1nniagNUg==
+  dependencies:
+    "@babel/helper-plugin-utils" "^7.8.3"
+    "@babel/plugin-transform-typescript" "^7.9.0"
+
 "@babel/register@^7.7.0":
   version "7.9.0"
   resolved "https://registry.yarnpkg.com/@babel/register/-/register-7.9.0.tgz#02464ede57548bddbb5e9f705d263b7c3f43d48b"
@@ -798,11 +822,21 @@
   resolved "https://registry.yarnpkg.com/@types/color-name/-/color-name-1.1.1.tgz#1c1261bbeaa10a8055bbc5d8ab84b7b2afc846a0"
   integrity sha512-rr+OQyAjxze7GgWrSaJwydHStIhHq2lvY3BOC2Mj7KnzI7XK0Uw1TOOdI9lDoajEbSWLiYgoo4f1R51erQfhPQ==
 
+"@types/eslint-visitor-keys@^1.0.0":
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/@types/eslint-visitor-keys/-/eslint-visitor-keys-1.0.0.tgz#1ee30d79544ca84d68d4b3cdb0af4f205663dd2d"
+  integrity sha512-OCutwjDZ4aFS6PB1UZ988C4YgwlBHJd6wCeQqaLdmadZ/7e+w79+hbMUFC1QXDNCmdyoRfAFdm0RypzwR+Qpag==
+
 "@types/estree@0.0.39":
   version "0.0.39"
   resolved "https://registry.yarnpkg.com/@types/estree/-/estree-0.0.39.tgz#e177e699ee1b8c22d23174caaa7422644389509f"
   integrity sha512-EYNwp3bU+98cpU4lAWYYL7Zz+2gryWH1qbdDTidVd6hkiR6weksdbMadyXKXNPEkQFhXM+hVO9ZygomHXp+AIw==
 
+"@types/json-schema@^7.0.3":
+  version "7.0.4"
+  resolved "https://registry.yarnpkg.com/@types/json-schema/-/json-schema-7.0.4.tgz#38fd73ddfd9b55abb1e1b2ed578cb55bd7b7d339"
+  integrity sha512-8+KAKzEvSUdeo+kmqnKrqgeE+LcA0tjYWFY7RPProVYwnqDjukzO+3b6dLD56rYX5TdWejnEOLJYOIeh4CXKuA==
+
 "@types/lodash@^4.14.119":
   version "4.14.149"
   resolved "https://registry.yarnpkg.com/@types/lodash/-/lodash-4.14.149.tgz#1342d63d948c6062838fbf961012f74d4e638440"
@@ -840,6 +874,49 @@
   dependencies:
     "@types/node" "*"
 
+"@typescript-eslint/eslint-plugin@^2.26.0":
+  version "2.26.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-2.26.0.tgz#04c96560c8981421e5a9caad8394192363cc423f"
+  integrity sha512-4yUnLv40bzfzsXcTAtZyTjbiGUXMrcIJcIMioI22tSOyAxpdXiZ4r7YQUU8Jj6XXrLz9d5aMHPQf5JFR7h27Nw==
+  dependencies:
+    "@typescript-eslint/experimental-utils" "2.26.0"
+    functional-red-black-tree "^1.0.1"
+    regexpp "^3.0.0"
+    tsutils "^3.17.1"
+
+"@typescript-eslint/experimental-utils@2.26.0", "@typescript-eslint/experimental-utils@^2.0.0":
+  version "2.26.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/experimental-utils/-/experimental-utils-2.26.0.tgz#063390c404d9980767d76274df386c0aa675d91d"
+  integrity sha512-RELVoH5EYd+JlGprEyojUv9HeKcZqF7nZUGSblyAw1FwOGNnmQIU8kxJ69fttQvEwCsX5D6ECJT8GTozxrDKVQ==
+  dependencies:
+    "@types/json-schema" "^7.0.3"
+    "@typescript-eslint/typescript-estree" "2.26.0"
+    eslint-scope "^5.0.0"
+    eslint-utils "^2.0.0"
+
+"@typescript-eslint/parser@^2.26.0":
+  version "2.26.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-2.26.0.tgz#385463615818b33acb72a25b39c03579df93d76f"
+  integrity sha512-+Xj5fucDtdKEVGSh9353wcnseMRkPpEAOY96EEenN7kJVrLqy/EVwtIh3mxcUz8lsFXW1mT5nN5vvEam/a5HiQ==
+  dependencies:
+    "@types/eslint-visitor-keys" "^1.0.0"
+    "@typescript-eslint/experimental-utils" "2.26.0"
+    "@typescript-eslint/typescript-estree" "2.26.0"
+    eslint-visitor-keys "^1.1.0"
+
+"@typescript-eslint/typescript-estree@2.26.0":
+  version "2.26.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-2.26.0.tgz#d8132cf1ee8a72234f996519a47d8a9118b57d56"
+  integrity sha512-3x4SyZCLB4zsKsjuhxDLeVJN6W29VwBnYpCsZ7vIdPel9ZqLfIZJgJXO47MNUkurGpQuIBALdPQKtsSnWpE1Yg==
+  dependencies:
+    debug "^4.1.1"
+    eslint-visitor-keys "^1.1.0"
+    glob "^7.1.6"
+    is-glob "^4.0.1"
+    lodash "^4.17.15"
+    semver "^6.3.0"
+    tsutils "^3.17.1"
+
 acorn-dynamic-import@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/acorn-dynamic-import/-/acorn-dynamic-import-4.0.0.tgz#482210140582a36b83c3e342e1cfebcaa9240948"
@@ -968,12 +1045,13 @@ arr-flatten@^1.0.1:
   integrity sha512-L3hKV5R/p5o81R7O02IGnwpDmkp6E982XhtbuwSe3O4qOtMMMtodicASA1Cny2U+aCXcNpml+m4dPsvsJ3jatg==
 
 array-includes@^3.0.3:
-  version "3.0.3"
-  resolved "https://registry.yarnpkg.com/array-includes/-/array-includes-3.0.3.tgz#184b48f62d92d7452bb31b323165c7f8bd02266d"
-  integrity sha1-GEtI9i2S10UrsxsyMWXH+L0CJm0=
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/array-includes/-/array-includes-3.1.1.tgz#cdd67e6852bdf9c1215460786732255ed2459348"
+  integrity sha512-c2VXaCHl7zPsvpkFsw4nxvFie4fh1ur9bpcgsVkIjqn0H/Xwdg+7fv3n2r/isyS8EBj5b06M9kHyZuIr4El6WQ==
   dependencies:
-    define-properties "^1.1.2"
-    es-abstract "^1.7.0"
+    define-properties "^1.1.3"
+    es-abstract "^1.17.0"
+    is-string "^1.0.5"
 
 array-unique@^0.2.1:
   version "0.2.1"
@@ -981,13 +1059,12 @@ array-unique@^0.2.1:
   integrity sha1-odl8yvy8JiXMcPrc6zalDFiwGlM=
 
 array.prototype.flat@^1.2.1:
-  version "1.2.2"
-  resolved "https://registry.yarnpkg.com/array.prototype.flat/-/array.prototype.flat-1.2.2.tgz#8f3c71d245ba349b6b64b4078f76f5576f1fd723"
-  integrity sha512-VXjh7lAL4KXKF2hY4FnEW9eRW6IhdvFW1sN/JwLbmECbCgACCnBHNyP3lFiYuttr0jxRN9Bsc5+G27dMseSWqQ==
+  version "1.2.3"
+  resolved "https://registry.yarnpkg.com/array.prototype.flat/-/array.prototype.flat-1.2.3.tgz#0de82b426b0318dbfdb940089e38b043d37f6c7b"
+  integrity sha512-gBlRZV0VSmfPIeWfuuy56XZMvbVfbEUnOXUvt3F/eUUUSyzlgLxhEX4YAEpxNAogRGehPSnfXyPtYyKAhkzQhQ==
   dependencies:
     define-properties "^1.1.3"
-    es-abstract "^1.15.0"
-    function-bind "^1.1.1"
+    es-abstract "^1.17.0-next.1"
 
 assertion-error@^1.1.0:
   version "1.1.0"
@@ -1184,7 +1261,7 @@ buffer@^5.5.0:
     base64-js "^1.0.2"
     ieee754 "^1.1.4"
 
-builtin-modules@^1.0.0, builtin-modules@^1.1.1:
+builtin-modules@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/builtin-modules/-/builtin-modules-1.1.1.tgz#270f076c5a72c02f5b65a47df94c5fe3a278892f"
   integrity sha1-Jw8HbFpywC9bZaR9+Uxf46J4iS8=
@@ -1497,11 +1574,6 @@ concat-with-sourcemaps@^1.0.5:
   dependencies:
     source-map "^0.6.1"
 
-confusing-browser-globals@^1.0.9:
-  version "1.0.9"
-  resolved "https://registry.yarnpkg.com/confusing-browser-globals/-/confusing-browser-globals-1.0.9.tgz#72bc13b483c0276801681871d4898516f8f54fdd"
-  integrity sha512-KbS1Y0jMtyPgIxjO7ZzMAuUpAKMt1SzCL9fsrKsX6b0zJPTaT0SiSPmewwVZg9UAO83HVIlEhZF84LIjZ0lmAw==
-
 console-control-strings@^1.0.0, console-control-strings@~1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/console-control-strings/-/console-control-strings-1.1.0.tgz#3d7cf4464db6446ea644bf4b39507f9851008e8e"
@@ -1781,7 +1853,7 @@ debug@^2.6.9:
   dependencies:
     ms "2.0.0"
 
-debug@^4.0.1, debug@^4.1.0:
+debug@^4.0.1, debug@^4.1.0, debug@^4.1.1:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/debug/-/debug-4.1.1.tgz#3b72260255109c6b589cee050f1d516139664791"
   integrity sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==
@@ -2000,23 +2072,7 @@ es-abstract@^1.12.0:
     string.prototype.trimleft "^2.0.0"
     string.prototype.trimright "^2.0.0"
 
-es-abstract@^1.15.0:
-  version "1.16.3"
-  resolved "https://registry.yarnpkg.com/es-abstract/-/es-abstract-1.16.3.tgz#52490d978f96ff9f89ec15b5cf244304a5bca161"
-  integrity sha512-WtY7Fx5LiOnSYgF5eg/1T+GONaGmpvpPdCpSnYij+U2gDTL0UPfWrhDw7b2IYb+9NQJsYpCA0wOQvZfsd6YwRw==
-  dependencies:
-    es-to-primitive "^1.2.1"
-    function-bind "^1.1.1"
-    has "^1.0.3"
-    has-symbols "^1.0.1"
-    is-callable "^1.1.4"
-    is-regex "^1.0.4"
-    object-inspect "^1.7.0"
-    object-keys "^1.1.1"
-    string.prototype.trimleft "^2.1.0"
-    string.prototype.trimright "^2.1.0"
-
-es-abstract@^1.17.0-next.1, es-abstract@^1.17.2, es-abstract@^1.17.5:
+es-abstract@^1.17.0, es-abstract@^1.17.0-next.1, es-abstract@^1.17.2, es-abstract@^1.17.5:
   version "1.17.5"
   resolved "https://registry.yarnpkg.com/es-abstract/-/es-abstract-1.17.5.tgz#d8c9d1d66c8981fb9200e2251d799eee92774ae9"
   integrity sha512-BR9auzDbySxOcfog0tLECW8l28eRGpDpU3Dm3Hp4q/N+VtLTmyj4EUN088XZWQDW/hzj6sYRDXeOFsaAODKvpg==
@@ -2033,7 +2089,7 @@ es-abstract@^1.17.0-next.1, es-abstract@^1.17.2, es-abstract@^1.17.5:
     string.prototype.trimleft "^2.1.1"
     string.prototype.trimright "^2.1.1"
 
-es-abstract@^1.5.1, es-abstract@^1.7.0:
+es-abstract@^1.5.1:
   version "1.13.0"
   resolved "https://registry.yarnpkg.com/es-abstract/-/es-abstract-1.13.0.tgz#ac86145fdd5099d8dd49558ccba2eaf9b88e24e9"
   integrity sha512-vDZfg/ykNxQVwup/8E1BZhVzFfBxs9NqMzGcvIJrqg5k2/5Za2bWo40dK2J1pgLngZ7c+Shh8lwYtLGyrwPutg==
@@ -2073,16 +2129,7 @@ escape-string-regexp@1.0.5, escape-string-regexp@^1.0.2, escape-string-regexp@^1
   resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz#1b61c0562190a8dff6ae3bb2cf0200ca130b86d4"
   integrity sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ=
 
-eslint-config-airbnb-base@^14.1.0:
-  version "14.1.0"
-  resolved "https://registry.yarnpkg.com/eslint-config-airbnb-base/-/eslint-config-airbnb-base-14.1.0.tgz#2ba4592dd6843258221d9bff2b6831bd77c874e4"
-  integrity sha512-+XCcfGyCnbzOnktDVhwsCAx+9DmrzEmuwxyHUJpw+kqBVT744OUBrB09khgFKlK1lshVww6qXGsYPZpavoNjJw==
-  dependencies:
-    confusing-browser-globals "^1.0.9"
-    object.assign "^4.1.0"
-    object.entries "^1.1.1"
-
-eslint-config-prettier@^6.3.0:
+eslint-config-prettier@^6.10.1:
   version "6.10.1"
   resolved "https://registry.yarnpkg.com/eslint-config-prettier/-/eslint-config-prettier-6.10.1.tgz#129ef9ec575d5ddc0e269667bf09defcd898642a"
   integrity sha512-svTy6zh1ecQojvpbJSgH3aei/Rt7C6i090l5f2WQ4aB05lYHeZIR1qL4wZyyILTbtmnbHP5Yn8MrsOJMGa8RkQ==
@@ -2090,21 +2137,29 @@ eslint-config-prettier@^6.3.0:
     get-stdin "^6.0.0"
 
 eslint-import-resolver-node@^0.3.2:
-  version "0.3.2"
-  resolved "https://registry.yarnpkg.com/eslint-import-resolver-node/-/eslint-import-resolver-node-0.3.2.tgz#58f15fb839b8d0576ca980413476aab2472db66a"
-  integrity sha512-sfmTqJfPSizWu4aymbPr4Iidp5yKm8yDkHp+Ir3YiTHiiDfxh69mOUsmiqW6RZ9zRXFaF64GtYmN7e+8GHBv6Q==
+  version "0.3.3"
+  resolved "https://registry.yarnpkg.com/eslint-import-resolver-node/-/eslint-import-resolver-node-0.3.3.tgz#dbaa52b6b2816b50bc6711af75422de808e98404"
+  integrity sha512-b8crLDo0M5RSe5YG8Pu2DYBj71tSB6OvXkfzwbJU2w7y8P4/yo0MyF8jU26IEuEuHF2K5/gcAJE3LhQGqBBbVg==
   dependencies:
     debug "^2.6.9"
-    resolve "^1.5.0"
+    resolve "^1.13.1"
 
 eslint-module-utils@^2.4.1:
-  version "2.5.0"
-  resolved "https://registry.yarnpkg.com/eslint-module-utils/-/eslint-module-utils-2.5.0.tgz#cdf0b40d623032274ccd2abd7e64c4e524d6e19c"
-  integrity sha512-kCo8pZaNz2dsAW7nCUjuVoI11EBXXpIzfNxmaoLhXoRDOnqXLC4iSGVRdZPhOitfbdEfMEfKOiENaK6wDPZEGw==
+  version "2.6.0"
+  resolved "https://registry.yarnpkg.com/eslint-module-utils/-/eslint-module-utils-2.6.0.tgz#579ebd094f56af7797d19c9866c9c9486629bfa6"
+  integrity sha512-6j9xxegbqe8/kZY8cYpcp0xhbK0EgJlg3g9mib3/miLaExuuwc3n5UEfSnU6hWMbT0FAYVvDbL9RrRgpUeQIvA==
   dependencies:
     debug "^2.6.9"
     pkg-dir "^2.0.0"
 
+eslint-plugin-expect-type@^0.0.4:
+  version "0.0.4"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-expect-type/-/eslint-plugin-expect-type-0.0.4.tgz#f3adced6cc634afd710b9b3936c1e82db88bcf94"
+  integrity sha512-H/+KMeZVOe6986IjWkf6bx4kJ46QTZi6kU+i94NVX+KVcbuiL5HIi6/RK9iSX3TKLG+kw5h+y8A0+xJZrjs0fA==
+  dependencies:
+    "@typescript-eslint/experimental-utils" "^2.0.0"
+    fs-extra "^8.1.0"
+
 eslint-plugin-import@^2.20.2:
   version "2.20.2"
   resolved "https://registry.yarnpkg.com/eslint-plugin-import/-/eslint-plugin-import-2.20.2.tgz#91fc3807ce08be4837141272c8b99073906e588d"
@@ -2145,6 +2200,13 @@ eslint-utils@^1.4.3:
   dependencies:
     eslint-visitor-keys "^1.1.0"
 
+eslint-utils@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/eslint-utils/-/eslint-utils-2.0.0.tgz#7be1cc70f27a72a76cd14aa698bcabed6890e1cd"
+  integrity sha512-0HCPuJv+7Wv1bACm8y5/ECVfYdfsAm9xmVb7saeFlxjPYALefjhbYoCkBjPdPzGH8wWyTpAez82Fh3VKYEZ8OA==
+  dependencies:
+    eslint-visitor-keys "^1.1.0"
+
 eslint-visitor-keys@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-1.1.0.tgz#e2a82cea84ff246ad6fb57f9bde5b46621459ec2"
@@ -2488,6 +2550,15 @@ fs-extra@^6.0.1:
     jsonfile "^4.0.0"
     universalify "^0.1.0"
 
+fs-extra@^8.1.0:
+  version "8.1.0"
+  resolved "https://registry.yarnpkg.com/fs-extra/-/fs-extra-8.1.0.tgz#49d43c45a88cd9677668cb7be1b46efdb8d2e1c0"
+  integrity sha512-yhlQgA6mnOJUKOsRUFsgJdQCvkKhcz8tlZG5HBQfReYZy46OwLcY+Zia0mtdHsOo9y/hP+CxMN0TU9QxoOtG4g==
+  dependencies:
+    graceful-fs "^4.2.0"
+    jsonfile "^4.0.0"
+    universalify "^0.1.0"
+
 fs.realpath@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/fs.realpath/-/fs.realpath-1.0.0.tgz#1504ad2523158caa40db4a2787cb01411994ea4f"
@@ -2619,6 +2690,18 @@ glob@^7.1.1, glob@^7.1.3:
     once "^1.3.0"
     path-is-absolute "^1.0.0"
 
+glob@^7.1.6:
+  version "7.1.6"
+  resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.6.tgz#141f33b81a7c2492e125594307480c46679278a6"
+  integrity sha512-LwaxwyZ72Lk7vZINtNNrywX0ZuLyStrdDtabefZKAY5ZGJhVtgdznluResxNmPitE0SAO+O26sWTHeKSI2wMBA==
+  dependencies:
+    fs.realpath "^1.0.0"
+    inflight "^1.0.4"
+    inherits "2"
+    minimatch "^3.0.4"
+    once "^1.3.0"
+    path-is-absolute "^1.0.0"
+
 globals@^11.1.0:
   version "11.12.0"
   resolved "https://registry.yarnpkg.com/globals/-/globals-11.12.0.tgz#ab8795338868a0babd8525758018c2a7eb95c42e"
@@ -2646,6 +2729,11 @@ graceful-fs@^4.1.2, graceful-fs@^4.1.6:
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.1.15.tgz#ffb703e1066e8a0eeaa4c8b80ba9253eeefbfb00"
   integrity sha512-6uHUhOPEBgQ24HM+r6b/QwWfZq+yiFcipKFrOFiBEnWdy5sdzYoi+pJeQaPI5qOLRFqWmAXUPQNsielzdLoecA==
 
+graceful-fs@^4.2.0:
+  version "4.2.3"
+  resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.2.3.tgz#4a12ff1b60376ef09862c2093edd908328be8423"
+  integrity sha512-a30VEBm4PEdx1dRB7MFK7BejejvCvBronbLjht+sHuGYj8PHs7M/5Z+rt5lw551vZ7yfTCj4Vuyy3mSJytDWRQ==
+
 growl@1.10.5:
   version "1.10.5"
   resolved "https://registry.yarnpkg.com/growl/-/growl-1.10.5.tgz#f2735dc2283674fa67478b10181059355c369e5e"
@@ -2721,9 +2809,9 @@ hex-color-regex@^1.1.0:
   integrity sha512-l9sfDFsuqtOqKDsQdqrMRk0U85RZc0RtOR9yPI7mRVOa4FsR/BVnZ0shmQRM96Ji99kYZP/7hn1cedc1+ApsTQ==
 
 hosted-git-info@^2.1.4:
-  version "2.7.1"
-  resolved "https://registry.yarnpkg.com/hosted-git-info/-/hosted-git-info-2.7.1.tgz#97f236977bd6e125408930ff6de3eec6281ec047"
-  integrity sha512-7T/BxH19zbcCTa8XkMlbK5lTo1WtgkFi3GvdWEyNuc4Vex7/9Dqbnpsf4JMydcfj9HCg4zUWFTL3Za6lapg5/w==
+  version "2.8.8"
+  resolved "https://registry.yarnpkg.com/hosted-git-info/-/hosted-git-info-2.8.8.tgz#7539bd4bc1e0e0a895815a2e0262420b12858488"
+  integrity sha512-f/wzC2QaWBs7t9IYqB4T3sR1xviIViXJRJTWBlx2Gf3g0Xi5vI7Yy4koXQ1c9OYDGHN9sBy1DQ2AB8fqZBWhUg==
 
 hsl-regex@^1.0.0:
   version "1.0.0"
@@ -2899,13 +2987,6 @@ is-buffer@~2.0.3:
   resolved "https://registry.yarnpkg.com/is-buffer/-/is-buffer-2.0.3.tgz#4ecf3fcf749cbd1e472689e109ac66261a25e725"
   integrity sha512-U15Q7MXTuZlrbymiz95PJpZxu8IlipAp4dtS3wOdgPXx3mqBnslrWU14kxfHB+Py/+2PVKSr37dMAgM2A4uArw==
 
-is-builtin-module@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/is-builtin-module/-/is-builtin-module-1.0.0.tgz#540572d34f7ac3119f8f76c30cbc1b1e037affbe"
-  integrity sha1-VAVy0096wxGfj3bDDLwbHgN6/74=
-  dependencies:
-    builtin-modules "^1.0.0"
-
 is-callable@^1.1.4:
   version "1.1.4"
   resolved "https://registry.yarnpkg.com/is-callable/-/is-callable-1.1.4.tgz#1e1adf219e1eeb684d691f9d6a05ff0d30a24d75"
@@ -3067,6 +3148,11 @@ is-stream@^1.1.0:
   resolved "https://registry.yarnpkg.com/is-stream/-/is-stream-1.1.0.tgz#12d4a3dd4e68e0b79ceb8dbc84173ae80d91ca44"
   integrity sha1-EtSj3U5o4Lec6428hBc66A2RykQ=
 
+is-string@^1.0.5:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/is-string/-/is-string-1.0.5.tgz#40493ed198ef3ff477b8c7f92f644ec82a5cd3a6"
+  integrity sha512-buY6VNRjhQMiF1qWDouloZlQbRhDPCebwxSjxMjxgemYT46YMd2NR0/H+fBhEfWX4A/w9TBJ+ol+okqJKFE6vQ==
+
 is-svg@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/is-svg/-/is-svg-2.1.0.tgz#cf61090da0d9efbcab8722deba6f032208dbb0e9"
@@ -3616,12 +3702,12 @@ noop-logger@^0.1.1:
   integrity sha1-lKKxYzxPExdVMAfYlm/Q6EG2pMI=
 
 normalize-package-data@^2.3.2:
-  version "2.4.0"
-  resolved "https://registry.yarnpkg.com/normalize-package-data/-/normalize-package-data-2.4.0.tgz#12f95a307d58352075a04907b84ac8be98ac012f"
-  integrity sha512-9jjUFbTPfEy3R/ad/2oNbKtW9Hgovl5O1FvFWKkKblNXoN/Oou6+9+KKohPK13Yc3/TyunyWhJp6gvRNR/PPAw==
+  version "2.5.0"
+  resolved "https://registry.yarnpkg.com/normalize-package-data/-/normalize-package-data-2.5.0.tgz#e66db1838b200c1dfc233225d12cb36520e234a8"
+  integrity sha512-/5CMN3T0R4XTj4DcGaexo+roZSdSFW/0AOOTROrjxzCG1wrWXEsGbRKevjlIL+ZDE4sZlJr5ED4YW0yqmkK+eA==
   dependencies:
     hosted-git-info "^2.1.4"
-    is-builtin-module "^1.0.0"
+    resolve "^1.10.0"
     semver "2 || 3 || 4 || 5"
     validate-npm-package-license "^3.0.1"
 
@@ -3726,16 +3812,6 @@ object.assign@4.1.0, object.assign@^4.1.0:
     has-symbols "^1.0.0"
     object-keys "^1.0.11"
 
-object.entries@^1.1.1:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/object.entries/-/object.entries-1.1.1.tgz#ee1cf04153de02bb093fec33683900f57ce5399b"
-  integrity sha512-ilqR7BgdyZetJutmDPfXCDffGa0/Yzl2ivVNpbx/g4UeWrCdRnFDUBrKJGLhGieRHDATnyZXWBeCb29k9CJysQ==
-  dependencies:
-    define-properties "^1.1.3"
-    es-abstract "^1.17.0-next.1"
-    function-bind "^1.1.1"
-    has "^1.0.3"
-
 object.getownpropertydescriptors@^2.0.3:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/object.getownpropertydescriptors/-/object.getownpropertydescriptors-2.0.3.tgz#8758c846f5b407adab0f236e0986f14b051caa16"
@@ -4847,6 +4923,11 @@ regexpp@^2.0.1:
   resolved "https://registry.yarnpkg.com/regexpp/-/regexpp-2.0.1.tgz#8d19d31cf632482b589049f8281f93dbcba4d07f"
   integrity sha512-lv0M6+TkDVniA3aD1Eg0DVpfU/booSu7Eev3TDO/mZKHBfVjgCGTV4t4buppESEYDtkArYFOxTJWv6S5C+iaNw==
 
+regexpp@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/regexpp/-/regexpp-3.0.0.tgz#dd63982ee3300e67b41c1956f850aa680d9d330e"
+  integrity sha512-Z+hNr7RAVWxznLPuA7DIh8UNX1j9CDrUQxskw9IrBE1Dxue2lyXT+shqEIeLUjrokxIP8CMy1WkjgG3rTsd5/g==
+
 regexpu-core@^4.5.4, regexpu-core@^4.6.0, regexpu-core@^4.7.0:
   version "4.7.0"
   resolved "https://registry.yarnpkg.com/regexpu-core/-/regexpu-core-4.7.0.tgz#fcbf458c50431b0bb7b45d6967b8192d91f3d938"
@@ -4928,14 +5009,14 @@ resolve@1.8.1:
   dependencies:
     path-parse "^1.0.5"
 
-resolve@^1.10.0:
+resolve@^1.10.0, resolve@^1.12.0, resolve@^1.13.1:
   version "1.15.1"
   resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.15.1.tgz#27bdcdeffeaf2d6244b95bb0f9f4b4653451f3e8"
   integrity sha512-84oo6ZTtoTUpjgNEr5SJyzQhzL72gaRodsSfyxC/AXRvwu0Yse9H8eF9IpGo7b8YetZhlI6v7ZQ6bKBFV/6S7w==
   dependencies:
     path-parse "^1.0.6"
 
-resolve@^1.12.0, resolve@^1.3.2, resolve@^1.5.0:
+resolve@^1.3.2, resolve@^1.5.0:
   version "1.13.1"
   resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.13.1.tgz#be0aa4c06acd53083505abb35f4d66932ab35d16"
   integrity sha512-CxqObCX8K8YtAhOBRg+lrcdn+LK+WYOS8tSjqSFbjtrI5PnS63QPhZl4+yKfrU9tdsbMu9Anr/amegT87M9Z6w==
@@ -5175,7 +5256,7 @@ semver@7.0.0:
   resolved "https://registry.yarnpkg.com/semver/-/semver-7.0.0.tgz#5f3ca35761e47e05b206c6daff2cf814f0316b8e"
   integrity sha512-+GB6zVA9LWh6zovYQLALHwv5rb2PHGlJi3lfiqIHxR0uuwCgefcOJc59v9fv1w8GbStwxuuqqAjI9NMAOOgq1A==
 
-semver@^6.1.2, semver@^6.2.0:
+semver@^6.1.2, semver@^6.2.0, semver@^6.3.0:
   version "6.3.0"
   resolved "https://registry.yarnpkg.com/semver/-/semver-6.3.0.tgz#ee0a64c8af5e8ceea67687b133761e1becbd1d3d"
   integrity sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==
@@ -5273,9 +5354,9 @@ sourcemap-codec@^1.4.4:
   integrity sha512-9NykojV5Uih4lgo5So5dtw+f0JgJX30KCNI8gwhz2J9A15wD0Ml6tjHKwf6fTSa6fAdVBdZeNOs9eJ71qCk8vA==
 
 spdx-correct@^3.0.0:
-  version "3.0.2"
-  resolved "https://registry.yarnpkg.com/spdx-correct/-/spdx-correct-3.0.2.tgz#19bb409e91b47b1ad54159243f7312a858db3c2e"
-  integrity sha512-q9hedtzyXHr5S0A1vEPoK/7l8NpfkFYTq6iCY+Pno2ZbdZR6WexZFtqeVGkGxW3TEJMN914Z55EnAGMmenlIQQ==
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/spdx-correct/-/spdx-correct-3.1.0.tgz#fb83e504445268f154b074e218c87c003cd31df4"
+  integrity sha512-lr2EZCctC2BNR7j7WzJ2FpDznxky1sjfxvvYEyzxNyb6lZXHODmEoJeFu4JupYlkfha1KZpJyoqiJ7pgA1qq8Q==
   dependencies:
     spdx-expression-parse "^3.0.0"
     spdx-license-ids "^3.0.0"
@@ -5294,9 +5375,9 @@ spdx-expression-parse@^3.0.0:
     spdx-license-ids "^3.0.0"
 
 spdx-license-ids@^3.0.0:
-  version "3.0.2"
-  resolved "https://registry.yarnpkg.com/spdx-license-ids/-/spdx-license-ids-3.0.2.tgz#a59efc09784c2a5bada13cfeaf5c75dd214044d2"
-  integrity sha512-qky9CVt0lVIECkEsYbNILVnPvycuEBkXoMFLRWsREkomQLevYhtRKC+R91a5TOAQ3bCMjikRwhyaRqj1VYatYg==
+  version "3.0.5"
+  resolved "https://registry.yarnpkg.com/spdx-license-ids/-/spdx-license-ids-3.0.5.tgz#3694b5804567a458d3c8045842a6358632f62654"
+  integrity sha512-J+FWzZoynJEXGphVIS+XEh3kFSjZX/1i9gFBaWQcB+/tmpe2qUsSBABpcxqxnAxFdiUFEgAX1bjYGQvIZmoz9Q==
 
 sprintf-js@~1.0.2:
   version "1.0.3"
@@ -5361,7 +5442,7 @@ string.prototype.trimend@^1.0.0:
     define-properties "^1.1.3"
     es-abstract "^1.17.5"
 
-string.prototype.trimleft@^2.0.0, string.prototype.trimleft@^2.1.0:
+string.prototype.trimleft@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/string.prototype.trimleft/-/string.prototype.trimleft-2.1.0.tgz#6cc47f0d7eb8d62b0f3701611715a3954591d634"
   integrity sha512-FJ6b7EgdKxxbDxc79cOlok6Afd++TTs5szo+zJTUyow3ycrRfJVE2pq3vcN53XexvKZu/DJMDfeI/qMiZTrjTw==
@@ -5378,7 +5459,7 @@ string.prototype.trimleft@^2.1.1:
     es-abstract "^1.17.5"
     string.prototype.trimstart "^1.0.0"
 
-string.prototype.trimright@^2.0.0, string.prototype.trimright@^2.1.0:
+string.prototype.trimright@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/string.prototype.trimright/-/string.prototype.trimright-2.1.0.tgz#669d164be9df9b6f7559fa8e89945b168a5a6c58"
   integrity sha512-fXZTSV55dNBwv16uw+hh5jkghxSnc5oHq+5K/gXgizHwAvMetdAJlHqqoFC1FSDVPYWLkAKl2cxpUT41sV7nSg==
@@ -5674,6 +5755,13 @@ tsutils@^2.29.0:
   dependencies:
     tslib "^1.8.1"
 
+tsutils@^3.17.1:
+  version "3.17.1"
+  resolved "https://registry.yarnpkg.com/tsutils/-/tsutils-3.17.1.tgz#ed719917f11ca0dee586272b2ac49e015a2dd759"
+  integrity sha512-kzeQ5B8H3w60nFY2g8cJIuH7JDpsALXySGtwGJ0p2LSjLgay3NdIpqq5SoOBe46bKDW2iq25irHCr8wjomUS2g==
+  dependencies:
+    tslib "^1.8.1"
+
 tunnel-agent@^0.6.0:
   version "0.6.0"
   resolved "https://registry.yarnpkg.com/tunnel-agent/-/tunnel-agent-0.6.0.tgz#27a5dea06b36b04a0a9966774b290868f0fc40fd"