Bump karma from 6.3.7 to 6.3.16 in /src/webapp

Bumps [karma](https://github.com/karma-runner/karma) from 6.3.7 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@v6.3.7...v6.3.16)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

src/webapp/package-lock.json

@@ -39,7 +39,7 @@
     "codelyzer": "^5.1.2",
     "jasmine-core": "~3.5.0",
     "jasmine-spec-reporter": "~5.0.0",
-    "karma": "^6.3.7",
+    "karma": "^6.3.16",
     "karma-chrome-launcher": "~3.1.0",
     "karma-coverage-istanbul-reporter": "~3.0.2",
     "karma-jasmine": "~4.0.0",