Support parallel builds

[jakub-bochenski]

Seeing this doesn't support multi-module builds I don't think -T is supported

See also takari/maven-profiler#6

[jcgay]

When you say "this doesn't support multi-module" do you refer to #9 ?
Because it does in fact (even if as you have discovered, the report is always written in the root project)

This extension should also work in parallel, do you have any error to share or timing report that do not seems right when run in parallel ?

Thx !

[jakub-bochenski]

Well the original title was "Document if this extension supports parallel build". So if it does -- that's great, would you mind giving a clear statement in the docs?

[jcgay]

Sure I can add it 👍