Updated various Maven plugins to their latest released versions.
Updated various Maven plugins to their latest released versions.

gv2011/jsoncore,DanySK/gson-extras,DanySK/gson-extras,mbrukman/gson,mbrukman/gson,google/gson,testcenter/gson,DanySK/gson-extras,todoooo/gson,todoooo/gson,testcenter/gson,testcenter/gson,todoooo/gson,mbrukman/gson