[maven-release-plugin] prepare for next development iteration

[maven-release-plugin] copy for tag snorql-0.12.0

[maven-release-plugin] prepare for next development iteration

[maven-release-plugin] copy for tag snorql-0.5.6

[maven-release-plugin] copy for tag snorql-0.5.5

[maven-release-plugin] copy for tag snorql-0.5.4

[maven-release-plugin] copy for tag snorql-0.5.3

[maven-release-plugin] copy for tag snorql-0.5.2

[maven-release-plugin] copy for tag snorql-0.5.1

[maven-release-plugin] copy for tag snorql-0.5.0