The Maven versions plugin claimed that some plugin already in use required Maven >= 3.0.4. I presume it would warn or fail if run with earlier versions, which would indicate no active devs are running an earlier version, but I can't be sure. This was just a bit of tidiness.

Is anyone out there on Maven < 3.0.4? In general I think it's easy to upgrade; on Linux they're just packages and AFAIK people usually use `brew` on OS X to easily update things like this.

If there's a hint that it might cause pains, it can be reversed, but I am presuming that we would know already if someone was using <3.0.4?