Bump karma from 3.0.0 to 6.3.16

Bumps [karma](https://github.com/karma-runner/karma) from 3.0.0 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](karma-runner/karma@v3.0.0...v6.3.16)

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

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

package.json

@@ -97,7 +97,7 @@
     "inject-loader": "^3.0.1",
     "jsdom": "^12.0.0",
     "jsdom-global": "^3.0.2",
-    "karma": "^3.0.0",
+    "karma": "^6.3.16",
     "karma-babel-preprocessor": "^6.0.1",
     "karma-chrome-launcher": "^2.2.0",
     "karma-coverage": "^1.1.1",