Bump yargs-parser in /extensions/ql-vscode

Bumps [yargs-parser](https://github.com/yargs/yargs-parser) from 5.0.0-security.0 to 20.2.4.
- [Release notes](https://github.com/yargs/yargs-parser/releases)
- [Changelog](https://github.com/yargs/yargs-parser/blob/main/CHANGELOG.md)
- [Commits](https://github.com/yargs/yargs-parser/commits/v20.2.4)

---
updated-dependencies:
- dependency-name: yargs-parser
  dependency-type: indirect
...

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Author: dependabot[bot]