Bump karma from 4.3.0 to 4.4.0

Bumps [karma](https://github.com/karma-runner/karma) from 4.3.0 to 4.4.0.
- [Release notes](https://github.com/karma-runner/karma/releases)
- [Changelog](https://github.com/karma-runner/karma/blob/master/CHANGELOG.md)
- [Commits](https://github.com/karma-runner/karma/compare/v4.3.0...v4.4.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

yarn.lock

@@ -1741,11 +1741,6 @@ core-js@^2.4.0, core-js@^2.5.0:
   resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.5.7.tgz#f972608ff0cead68b841a16a932d0b183791814e"
   integrity sha512-RszJCAxg/PP6uzXVXL6BsxSXx/B05oJAQ2vkJRjyjrEcNVycaqOmNb5OTxZPE3xa5gwZduqza6L9JOCenh/Ecw==
 
-core-js@^3.1.3:
-  version "3.2.1"
-  resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.2.1.tgz#cd41f38534da6cc59f7db050fe67307de9868b09"
-  integrity sha512-Qa5XSVefSVPRxy2XfUC13WbvqkxhkwB3ve+pgCQveNgYzbM/UxZeu1dcOX/xr4UmfUd+muuvsaxilQzCyUurMw==
-
 core-util-is@1.0.2, core-util-is@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
@@ -4342,9 +4337,9 @@ karma-webpack@^2.0.13:
     webpack-dev-middleware "^1.12.0"
 
 karma@^4.3.0:
-  version "4.3.0"
-  resolved "https://registry.yarnpkg.com/karma/-/karma-4.3.0.tgz#e14471ea090a952265a42ebb442b1a3c09832559"
-  integrity sha512-NSPViHOt+RW38oJklvYxQC4BSQsv737oQlr/r06pCM+slDOr4myuI1ivkRmp+3dVpJDfZt2DmaPJ2wkx+ZZuMQ==
+  version "4.4.0"
+  resolved "https://registry.yarnpkg.com/karma/-/karma-4.4.0.tgz#10f16117a37b388aa86618a8815b5c9acf1d7d6d"
+  integrity sha512-+mvzi+gBWHPrlqt1KE0WrrjcKuePX7WWJjTYNaewp6U00inno/DTSk+QHMbc+aV09scErWjhJukxswFyS7u2qw==
   dependencies:
     bluebird "^3.3.0"
     body-parser "^1.16.1"
@@ -4352,7 +4347,6 @@ karma@^4.3.0:
     chokidar "^3.0.0"
     colors "^1.1.0"
     connect "^3.6.0"
-    core-js "^3.1.3"
     di "^0.0.1"
     dom-serialize "^2.2.0"
     flatted "^2.0.0"