1. When tracking the taskList, we want to include all composer.json files, even if
   they don't currently or directly defines tasks... because they *may* add or move
   tasks later.

2. I seem to have misunderstood the Lurker API (`track($trackingId, $resource)`) -- if
   you're tracking multiple files for the same purpose, then those files each need
   to all have distinct trackingIds. If you try to track multiple files under the
   same trackingId, then it simply forgets/cancels the earlier files.