Add support for branch, closes #16

[codecov[bot]]

Codecov Report

Base: 62.13% // Head: 63.66% // Increases project coverage by +1.52% :tada:

Coverage data is based on head (3f42116) compared to base (38a7864). Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #50 +/- ## ============================================ + Coverage 62.13% 63.66% +1.52% - Complexity 75 77 +2 ============================================ Files 27 27 Lines 309 311 +2 Branches 11 11 ============================================ + Hits 192 198 +6 + Misses 109 105 -4 Partials 8 8 ``` | [Impacted Files](https://codecov.io/gh/dmfs/gitversion/pull/50?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Marten+Gajda) | Coverage Δ | | |---|---|---| | [.../main/java/org/dmfs/gitversion/git/GitVersion.java](https://codecov.io/gh/dmfs/gitversion/pull/50/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Marten+Gajda#diff-Z2l0dmVyc2lvbi1kc2wvc3JjL21haW4vamF2YS9vcmcvZG1mcy9naXR2ZXJzaW9uL2dpdC9HaXRWZXJzaW9uLmphdmE=) | `84.84% <100.00%> (+0.97%)` | :arrow_up: | | [...rsion/git/changetypefacories/condition/Branch.java](https://codecov.io/gh/dmfs/gitversion/pull/50/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Marten+Gajda#diff-Z2l0dmVyc2lvbi1kc2wvc3JjL21haW4vamF2YS9vcmcvZG1mcy9naXR2ZXJzaW9uL2dpdC9jaGFuZ2V0eXBlZmFjb3JpZXMvY29uZGl0aW9uL0JyYW5jaC5qYXZh) | `100.00% <0.00%> (+100.00%)` | :arrow_up: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Marten+Gajda). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Marten+Gajda)

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