Bump karma from 2.0.5 to 6.3.16

Bumps [karma](https://github.com/karma-runner/karma) from 2.0.5 to 6.3.16.
- [Release notes](https://github.com/karma-runner/karma/releases)
- [Changelog](https://github.com/karma-runner/karma/blob/master/CHANGELOG.md)
- [Commits](karma-runner/karma@v2.0.5...v6.3.16)

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

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

Author: dependabot[bot]

package.json

@@ -115,7 +115,7 @@
     "file-loader": "^1.1.11",
     "html-webpack-plugin": "^3.2.0",
     "inject-loader": "^4.0.1",
-    "karma": "^2.0.2",
+    "karma": "^6.3.16",
     "karma-chai": "^0.1.0",
     "karma-coverage": "^1.1.2",
     "karma-electron": "^6.0.0",