Option to exclude modules from commands

The tool already has a `-M` option to select modules against which to run commands, but it is not easily possible to exclude one or more modules.

This typically happens when working on a plugin and the rest of the ecosystem bumps a version, but the plugin is on a branch. In order to rebase the plugin without too much manual work, all modules need to be updated.

Maybe this could work analogous to maven profile selection: `-Pprofile` selects it, which `-P-profile` deselects.