https://bugzilla.redhat.com/show_bug.cgi?id=2051150
--- Comment #1 from jiri vanek jvanek@redhat.com --- [ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile (base-compile) on project gson: Compilation failure: Compilation failure: [ERROR] Source option 6 is no longer supported. Use 7 or later. [ERROR] Target option 6 is no longer supported. Use 7 or later.
Should be easy enough to fix