Feature: Adding build data

[TLii]

Hi

Thanks @christian-draeger for your excellent work on this action. Simple yet effective solution to a common annoyance of setting up automatic versioning.

I quickly noticed that I need to be able to add build number to the version string, so I added the needed logic for that in a forked repo (TLii/increment-semantic-version-with-build-data). All changes are (should be) non-breaking.

Before I open a pull request, do you see this as a feature that should or could be added to the upstream, or shall I keep it a separate fork?