Support GraphQL closingIssuesReferences
Hi there, the GitHub API supports the concept of closingIssuesReferences (see https://docs.github.com/en/graphql/reference/objects#pullrequest) which is the way to link an issue to be closed automatically when a PR fixes it.
Is it possible to implement it in the PyGithub library as well?
Looks like this project has never called into the GraphQL API, and the REST API does not seem to provide this feature yet.
PyGithub now has its first GraphQL call, see https://github.com/PyGithub/PyGithub/commit/232df79a2947dc96363bdc6f51a6f446ff2b241f#diff-90017b18548bd848900b7cffd7fe86a610dc20e5d228663dfb429a47cdf65a20R767-R772 for reference.