version upgrades
prevent maven-deploy-plugin from signing
skip pgp
[maven-release-plugin] prepare release v0.3.0
[maven-release-plugin] prepare for next development iteration
Merge branch 'release/0.3.0' into develop

* release/0.3.0:
  [maven-release-plugin] prepare for next development iteration
  [maven-release-plugin] prepare release v0.3.0