Bump github-api from 1.318 to 2.0.0 (alpha)

[alecharp]

WARNING: This is a work in progress.

Description

Upgrating the GitHub API library to its new major release.
This is to see how the integration of the new major release of the library can be integrated into this project.
See hub4j/github-api#1938.

Testing done

Submitter checklist

Beta Give feedback

1. If an issue exists, it is well described and linked in the description
2. The description of this pull request is detailed and explain why this pull request is needed
3. The changeset is on a specific branch. Using feature/ for new feature, or improvements ; Using fix/ for bug fixes ; Using docs/ for any documentation changes.
4. If required, the documentation has been updated
5. There is automated tests to cover the code change / addition or an explanation why there is no tests in the description.