Bump karma from 4.4.1 to 6.3.14 in /src/Umbraco.Web.UI.Client

Bumps [karma](https://github.com/karma-runner/karma) from 4.4.1 to 6.3.14.
- [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/v4.4.1...v6.3.14)

---
updated-dependencies:
- dependency-name: karma
  dependency-type: direct:development
...

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

src/Umbraco.Web.UI.Client/package.json

@@ -80,7 +80,7 @@
     "gulp-wrap-js": "0.4.1",
     "jasmine-core": "3.5.0",
     "jsdom": "16.4.0",
-    "karma": "4.4.1",
+    "karma": "6.3.14",
     "karma-jasmine": "2.0.1",
     "karma-jsdom-launcher": "^8.0.2",
     "karma-junit-reporter": "2.0.1",