[maven-release-plugin] copy for tag 4.9.2

[maven-release-plugin] copy for tag 4.9.1

[maven-release-plugin] copy for tag 4.9

update doc for releasing

[maven-release-plugin] copy for tag antlr4-master-4.8-1

[maven-release-plugin] copy for tag 4.7.2

[maven-release-plugin] copy for tag 4.7.1

[maven-release-plugin] copy for tag 4.7

[maven-release-plugin] copy for tag 4.6