Update contributing guide with new version embedding mechanism

Merge pull request twpayne#634 from twpayne/ignore-lookupgroupid-errors

Only set group value if user.LookupGroupId succeeds

Merge pull request twpayne#617 from twpayne/fix-commit-message-templa…

…te-path

Fix commit message template path

Merge pull request twpayne#612 from twpayne/revert-assets

Revert "Move completions into assets directory"

Tidy up release process

Temporarily disable bash completion in snaps

Rename internal command for consistency (twpayne#576)

Rename internal command for consistency

Merge pull request twpayne#553 from twpayne/keepassxc-show-protected

Pass --show-protected to keepassxc-cli version 2.5.2 or later

Remove stale entry from .gitignore

Merge pull request twpayne#525 from twpayne/add-template

Don't add files if template would be overwritten