bugfixes and minor improvements

• branch: fix --set-upstream-to syntax (#122)
• pull: try "git pull --revert" then revert back to explicit "git remote prune" which works better, idk (#121)
• Add bun support to the 'pull' command (#115)
• Whitespace/prettier reformatting pass (#114)
• Minor markdown fixes for README

full changeset: 1.0.7...v1.0.8

see README for installation instructions

thanks for using git-friendly!