Bump socket.io and karma in /KanbanAngularApplication/ClientApp

Bumps [socket.io](https://github.com/socketio/socket.io) to 2.5.1 and updates ancestor dependency [karma](https://github.com/karma-runner/karma). These dependencies need to be updated together.


Updates `socket.io` from 2.1.1 to 2.5.1
- [Release notes](https://github.com/socketio/socket.io/releases)
- [Changelog](https://github.com/socketio/socket.io/blob/2.5.1/CHANGELOG.md)
- [Commits](socketio/socket.io@2.1.1...2.5.1)

Updates `karma` from 5.0.2 to 5.2.3
- [Release notes](https://github.com/karma-runner/karma/releases)
- [Changelog](https://github.com/karma-runner/karma/blob/master/CHANGELOG.md)
- [Commits](karma-runner/karma@v5.0.2...v5.2.3)

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

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Author: dependabot[bot]