Bump karma from 4.1.0 to 6.3.16 (#15)

Bumps [karma](https://github.com/karma-runner/karma) from 4.1.0 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](https://github.com/karma-runner/karma/compare/v4.1.0...v6.3.16)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -35,7 +35,7 @@
     "codelyzer": "^5.0.0",
     "jasmine-core": "~3.4.0",
     "jasmine-spec-reporter": "~4.2.1",
-    "karma": "~4.1.0",
+    "karma": "~6.3.16",
     "karma-chrome-launcher": "~2.2.0",
     "karma-coverage-istanbul-reporter": "~2.0.1",
     "karma-jasmine": "~2.0.1",