[skip-ci] Releasing 2.6.1

[skip-ci] Releasing 2.5.12

[maven-release-plugin] copy for tag 2.3.6

[skip-ci] Releasing 2.5.11

[maven-release-plugin] copy for tag 2.6.0

[skip-ci] Releasing 2.5.10

[maven-release-plugin] copy for tag 2.6.0-beta

[skip-ci] Releasing 2.5.9

[maven-release-plugin] copy for tag 2.6.0-alpha

[maven-release-plugin] copy for tag 2.5.8