Adopt odd/even versioning for release/development
Just as GNOME, Proton should use even ended version numbers for releases and odd ended version numbers for development.
E.g:
- 0.1.10 = release
- 0.1.11 = development after 0.1.10 release
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Btw, releases should change `minor`, not `patch`. Which would mean:
- 0.2.0 = release
- 0.3.0 = development after 0.2.0
- 0.2.1 = patch for 0.2.0 release that should be merged onto 0.3.0
issue