Bump vscode-languageclient from 7.0.0 to 8.1.0

Bumps [vscode-languageclient](https://github.com/Microsoft/vscode-languageserver-node/tree/HEAD/client) from 7.0.0 to 8.1.0.
- [Release notes](https://github.com/Microsoft/vscode-languageserver-node/releases)
- [Commits](https://github.com/Microsoft/vscode-languageserver-node/commits/HEAD/client)

---
updated-dependencies:
- dependency-name: vscode-languageclient
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Author: dependabot[bot]