Default branches should always have a patch version of 0, because they are used to build towards new minor releases.
0.13.1-SNAPSHOT will appear in
release/0.13 after the tag
v0.13.0 is created. That branch is then building towards the first patch of 0.13.
Having artifacts and tags unrelated to those
release/0.13 commits can confuse maven, as well as the release candidate logic.