Update Maven libs and plugin

[chrjohn]

#826 (comment)

Thanks @cstamas

[cstamas]

Just FTR: this is not maven but one foundation libs of it: Sisu Inject (JSR330) and Sisu Plexus must be updated in "lockstep", so user must ensure it is same version of those two artifacts present on classpath at any time.
At runtime of the plugin it is Maven that make sure about this, but during build it is user duty to enforce this.