Push to the current branch by default.

Instead of hardcoding the branch name, We can try pushing to the current branch.
fix: Error w/ multiple files using `bump:git`

Fixes issue #42
Only push current branch, Add debug logging
Merge branch 'pr-48'

* pr-48:
  Push to the current branch by default.
Merge branch 'pr-53'

* pr-53:
  Only push current branch, Add debug logging
Merge branch 'pr-51'

* pr-51:
  fix: Error w/ multiple files using `bump:git`