Bump @octokit/auth-app from 4.0.9 to 5.0.6 (#511)

Bumps [@octokit/auth-app](https://github.com/octokit/auth-app.js) from 4.0.9 to 5.0.6.
- [Release notes](https://github.com/octokit/auth-app.js/releases)
- [Commits](octokit/auth-app.js@v4.0.9...v5.0.6)

---
updated-dependencies:
- dependency-name: "@octokit/auth-app"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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