Feature request: default to branch: main in addition to branch: master

[webbp]

Many repos now use "main" not "master", e.g., supertab. Please also default to branch: main, e.g., try main, then master, so that we don't have to update our vim configs on every server adding , { 'branch': 'main' } every time this happens with another vim plugin.

[junegunn]

I believe this is already handled by https://github.com/junegunn/vim-plug/pull/1272.