"master" branch renamed to "main"

[srittau]

I don't want to go into the political reasons for renaming the branch, but in my opinion there is a clear push to standardize on the new name main. I believe there was also a SC decision that all projects under the python org should eventually change to that name, although we haven't been approached about this. But CPython has switched (and the stub_uploader always used main). Selfishly, I also renamed the branches in most of my projects, with typeshed being one of the last still using master.

[AlexWaygood]

I support doing this.

[srittau]

Cc @JelleZijlstra @hauntsaninja

If there are no objections, I would do the honors tomorrow (Tuesday CET).

[srittau]

From what I can see, the following files need to be updated after the transition:

• .github/workflows/mypy_primer.yml
• README.md
• scripts/stubsabot.py

[srittau]

Also in the stub_uploader:

• stub_uploader/build_wheel.py
• stub_uploader/get_version.py

[srittau]

I have renamed the branch now. Contributors working directly from the typeshed repository will need to run the following commands locally to update their local copy:

git branch -m master main
git fetch origin
git branch -u origin/main main
git remote set-head origin -a