--file-watch is watching test suites again

[tswelsh]

This is a regression, the original issue was #3483. At a guess it is due to commit b008a33, which looks like it now uses all package compononents in getPackageFilesForTargets instead of lib + other targets components. Probably an easy fix to make it lib + sublibs + other targets (I don't know anything about sublibs, but presumably they can't be targets and should always be taken into account?). A test would have picked this up, that's on me as I fixed the original issue without adding a test.

$ stack --version
Version 1.7.1, Git revision 681c800873816c022739ca7ed14755e85a579565 (5807 commits) x86_64 hpack-0.28.2

Method of installation

Official binary, downloaded from stackage.org or fpcomplete's package repository