Update to 0.19
- New upstream release 0.19
- More Makefile.PL updates
- Makefile.PL now checks for a working compiler using ExtUtils::HasCompiler
(inlined into the build) rather than ExtUtils::CBuilder (CPAN RT#113685)
- Simplify find command using -delete
- Fix EPEL conditional - only currently buildable for EPEL 7 onwards
- Drop BR: for Test::Pod::No404s, which breaks koji builds