Suggestion: Mark the plugin @threadSafe

[willkroboth]

Currently, when using the SpecialSource Maven plugin and the -T maven build option (allowing maven to build multiple modules in parallel), this warning shows up:

[WARNING] *****************************************************************
[WARNING] * Your build is requesting parallel execution, but project      *
[WARNING] * contains the following plugin(s) that have goals not marked   *
[WARNING] * as @threadSafe to support parallel building.                  *
[WARNING] * While this /may/ work fine, please look for plugin updates    *
[WARNING] * and/or request plugins be made thread-safe.                   *
[WARNING] * If reporting an issue, report it against the plugin in        *
[WARNING] * question, not against maven-core                              *
[WARNING] *****************************************************************
[WARNING] The following plugins are not marked @threadSafe:
[WARNING] net.md-5:specialsource-maven-plugin:1.2.4
[WARNING] Enable debug to see more precisely which goals are not marked @threadSafe.

As far as I can tell, the special source maven plugin works as expected when running in parallel. Honestly, I will probably continue running SpecialSource in parallel whether or not it gets marked @threadsafe, but I figured I would report it here since the warning asks so.
If this is a really bad idea, please tell me so I can stop, and if it is okay, it would be nice if the plugin was marked @threadsafe so that these warnings do not appear. Thoughts?