Bump karma from 6.3.14 to 6.3.16 in /assets (#1526)

Bumps [karma](https://github.com/karma-runner/karma) from 6.3.14 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@v6.3.14...v6.3.16)

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

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

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

Author: dependabot[bot]

assets/package-lock.json

@@ -45,7 +45,7 @@
     "flex.less": "^1.1.0",
     "handlebars": "^4.7.7",
     "handlebars-loader": "^1.7.1",
-    "karma": "^6.3.14",
+    "karma": "^6.3.16",
     "karma-chai-plugins": "^0.6.0",
     "karma-chrome-launcher": "^0.2.0",
     "karma-firefox-launcher": "^0.1.6",