Bump engine.io and karma in /pact/pact-angular

Bumps [engine.io](https://github.com/socketio/engine.io) to 6.2.1 and updates ancestor dependency [karma](https://github.com/karma-runner/karma). These dependencies need to be updated together.


Updates `engine.io` from 1.8.3 to 6.2.1
- [Release notes](https://github.com/socketio/engine.io/releases)
- [Changelog](https://github.com/socketio/engine.io/blob/main/CHANGELOG.md)
- [Commits](https://github.com/socketio/engine.io/compare/1.8.3...6.2.1)

Updates `karma` from 1.7.1 to 6.4.1
- [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...v6.4.1)

---
updated-dependencies:
- dependency-name: engine.io
  dependency-type: indirect
- dependency-name: karma
  dependency-type: direct:development
...

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

pact/pact-angular/package.json

@@ -36,7 +36,7 @@
     "codelyzer": "~3.2.0",
     "jasmine-core": "~2.6.2",
     "jasmine-spec-reporter": "~4.1.0",
-    "karma": "~1.7.0",
+    "karma": "~6.4.1",
     "karma-chrome-launcher": "~2.1.1",
     "karma-cli": "~1.0.1",
     "karma-coverage-istanbul-reporter": "^1.2.1",