[maven-release-plugin] copy for tag v0.6.8

[maven-release-plugin] copy for tag v0.6.7

[maven-release-plugin] copy for tag v0.6.6

[maven-release-plugin] copy for tag v0.6.5

[maven-release-plugin] copy for tag v0.6.4

[maven-release-plugin] copy for tag v0.6.3

[maven-release-plugin] copy for tag v0.6.2

[maven-release-plugin] copy for tag v0.6.1

[maven-release-plugin] copy for tag v0.6.1-M1

[maven-release-plugin] copy for tag v0.6.0