Request: Configurable default branch name

[DavSanchez]

Hi all!

First of all, thank you for your awesome job with Summoner and Kowainik. Summoner is my go to for Haskell projects! I'd like to check if a configurable default branch name is on your roadmap, or if perhaps you would accept a PR adding that feature. I'd appreciate if the option existed, as I usually find myself preventing Summoner from uploading a project to GitHub so I can modify the branch name first and then pushing manually (I have had issues with git if I change it in the remote after it has been pushed). That way the created repos can be aligned with any defaults the user has set in their GitHub settings.

What do you think?

Thanks and regards!