changing to gitversion 4, and mode mainline

[gaelcolas]

I think the Mainline mode would work well for Trunk based dev as you do.
I think we should:

• build and pre-release every PR that you merge to master as a preview
• release main versions when upon tag

This simple PR is a way to open the discussion.
There's also a dotnet core task of GitVersion 4 that might have a different name, and we should probably use instead.

[Jaykul]

Yep, I'm switching to 4 and mainline on all my projects, thanks.
You took the "beta" tag off for feature branches though.
What tag does it apply by default, branch name? I guess it's fine, regardless...

[gaelcolas]

Yes it's branch name + commit increment.
I think using Beta is misleading as it's only isolated feature branch, and knowing its actual history is tricky.
The commits of -beta0004 would not necessary be in -beta0008, if they're from two different feature branches, and none of them merged yet.
I might be wrong though, but it seems confusing nonetheless! :)