Gulp test is replaced with mocha using npm-scripts

.babelrc

@@ -1,3 +0,0 @@
-{
-  "presets": ["es2015", "stage-2"]
-}

babel.config.js

@@ -0,0 +1,16 @@
+module.exports = (api) => {
+  api.cache(true)
+  return {
+    presets: [
+      [
+        '@babel/preset-env',
+        {
+        loose: true,
+        targets: {
+          browsers: ['last 2 versions', 'IE >= 9'],
+        },
+        },
+      ],
+    ],
+  }
+}

package.json

@@ -21,9 +21,7 @@
   ],
   "scripts": {
     "dtslint": "dtslint --localTs node_modules/typescript/lib types",
-    "test": "gulp && yarn -s dtslint",
-    "test:watch": "gulp watch",
-    "prepublish": "gulp prepublish",
+    "test:mocha": "mocha --recursive --require \"@babel/register\" test",
     "perf-server": "`npm bin`/webpack-dev-server --config perf/webpack.config.js --hot"
   },
   "license": "MIT",
@@ -34,14 +32,17 @@
     "lodash": "^4.2.0"
   },
   "devDependencies": {
+    "@babel/core": "^7.7.0",
+    "@babel/plugin-proposal-object-rest-spread": "^7.6.2",
+    "@babel/plugin-transform-react-jsx": "^7.7.0",
+    "@babel/plugin-transform-react-jsx-source": "^7.7.4",
+    "@babel/preset-env": "^7.7.1",
+    "@babel/register": "^7.7.0",
     "@types/chai": "^4.1.7",
     "@types/lodash": "^4.14.119",
     "@types/mocha": "^7.0.1",
     "@types/node": "^13.1.0",
-    "babel-core": "^6.4.0",
-    "babel-loader": "^6.2.1",
-    "babel-preset-es2015": "^6.3.13",
-    "babel-preset-stage-2": "^6.3.13",
+    "babel-loader": "^8.0.6",
     "benchmark": "^2.1.4",
     "chai": "^4.2.0",
     "dtslint": "^2.0.0",
@@ -51,25 +52,22 @@
     "eslint-plugin-import": "^2.2.0",
     "eslint-plugin-prettier": "^2.0.1",
     "exports-loader": "^0.7.0",
-    "gulp": "^3.6.0",
-    "gulp-babel": "^7.0.1",
-    "gulp-eslint": "^3.0.1",
-    "gulp-mocha": "^2.0.0",
     "karma": "^4.3.0",
-    "karma-babel-preprocessor": "^7.0.0",
+    "karma-babel-preprocessor": "^8.0.1",
     "karma-chrome-launcher": "^3.1.0",
     "karma-mocha": "^1.3.0",
     "karma-mocha-reporter": "^2.2.5",
     "karma-phantomjs-launcher": "^1.0.4",
-    "karma-webpack": "^2.0.13",
+    "karma-webpack": "^4.0.2",
     "mocha": "^7.0.0",
     "phantomjs-prebuilt": "^2.1.14",
     "prettier": "^1.1.0",
     "rimraf": "^3.0.0",
     "typescript": "^3.6.3",
-    "webpack": "^1.10.5",
+    "webpack": "^4.42.1",
+    "webpack-cli": "^3.3.11",
     "webpack-dev-server": "^3.1.11",
-    "webpack-stream": "^2.1.0"
+    "webpack-stream": "^5.2.1"
   },
   "types": "types"
 }