Prevent versioning overide during releases

[shiroyasha]

A version should never be overridden.

[shiroyasha]

Partially handled in https://github.com/renderedtext/sem/commit/49bf80ecfd46726a52f31100aebad9752ddaf280.

Things that still needs to be improved:

• Release stable and edge should not trigger a rebuild from zero
• Bake in sha/build id in release as part of the sem version

[shiroyasha]

Handled with Github releases.