Previous version is the same as current version when building tags

[mockitoguy]

In the recent release we've added scmVersion.previousVersion. It works well for snapshots but does not quite work when building tags:

• when building snapshots: scmVersion.version=1.0.0, scmVersion.previousVersion=1.0.1-SNAPSHOT
• when building tags: scmVersion.version=1.0.1, scmVersion.previousVersion=1.0.1

Since I'm in need of this feature, I'll take a look ;-)

[bgalek]

@mockitoguy thx ;)

[EisenRatte]

in my opinion this is a bug and should therefore be fixed instead of adding another property.
i created a PR #413

[bgalek]

@mockitoguy what do you think? Should we be discussing your PR or #413 way?:)