[maven-release-plugin] copy for tag gson-parent-2.8.0

[maven-release-plugin] copy for tag gson-parent-2.7

[maven-release-plugin] copy for tag gson-parent-2.6.2

[maven-release-plugin] copy for tag gson-parent-2.6.1

[maven-release-plugin] copy for tag gson-parent-2.6

[maven-release-plugin] copy for tag gson-parent-2.5

[maven-release-plugin] copy for tag gson-parent-2.4

[maven-release-plugin] copy for tag gson-2.4

[maven-release-plugin] copy for tag gson-2.3.1

[maven-release-plugin] copy for tag gson-2.3