Add a case for incompatible Perl package versions in check_modules.pl.

Any package can have an `incompatibleVersions` flag whose value should
be a reference to an array of version strings.  If the version on the
system of a package is one of these versions, then `check_modules.pl`
will warn about it.

`Mojolicious` now has this set for versions 9.43, 9.44, 9.45, and 9.46.

Also remove unneeded quotes on left operands of a fat comma and hash
keys.  I missed these when they were added in #2893.  I left the quotes
on the single word package names which also don't need them, but this is
consistent with the other package names that do.

Author: drgrice1