On develop startegy, if the develop branch and release merge base are the same version should not be bump

[qetza]

Hi,
Here's the scenario using the develop version strategy

• base version is 1.0.0
• commit on develop => develop version is 1.1.0-alpha.1
• create release/2.0.0 => release version is 2.0.0, develop version is 2.1.0-alpha.0

Since i haven't done any changes on develop, the version should still be 1.1.0-alpha.1. Version should be bump only after a new commit on develop.

See pull request #1000

[JakeGinnivan]

Fixed by #1000