Bump karma from 1.7.1 to 6.3.16

Bumps [karma](https://github.com/karma-runner/karma) from 1.7.1 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/1.7.1...v6.3.16)

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

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

package.json

@@ -74,7 +74,7 @@
         "electron-builder": "^20.39.0",
         "jasmine-core": "~2.99.1",
         "jasmine-spec-reporter": "~4.2.1",
-        "karma": "~1.7.1",
+        "karma": "~6.3.16",
         "karma-chrome-launcher": "~2.2.0",
         "karma-coverage-istanbul-reporter": "~2.0.0",
         "karma-jasmine": "~1.1.0",