Bump @koa/cors and @vscode/test-web (#83)

Bumps [@koa/cors](https://github.com/koajs/cors) to 5.0.0 and updates ancestor dependency [@vscode/test-web](https://github.com/microsoft/vscode-test-web). These dependencies need to be updated together.


Updates `@koa/cors` from 3.3.0 to 5.0.0
- [Changelog](https://github.com/koajs/cors/blob/master/History.md)
- [Commits](koajs/cors@3.3.0...5.0.0)

Updates `@vscode/test-web` from 0.0.24 to 0.0.50
- [Changelog](https://github.com/microsoft/vscode-test-web/blob/main/CHANGELOG.md)
- [Commits](microsoft/vscode-test-web@v0.0.24...v0.0.50)

---
updated-dependencies:
- dependency-name: "@koa/cors"
  dependency-type: indirect
- dependency-name: "@vscode/test-web"
  dependency-type: direct:development
...

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