Fix MANIFEST

MANIFEST.SKIP contained overbroad patterns, and was failing to include
necessary things including Makefile.PL.

Author: kulp

MANIFEST

@@ -9,11 +9,13 @@ inc/Module/Install/Base.pm
 inc/Module/Install/Can.pm
 inc/Module/Install/Fetch.pm
 inc/Module/Install/Include.pm
+inc/Module/Install/Makefile.pm
 inc/Module/Install/Metadata.pm
 inc/Module/Install/Win32.pm
 inc/Module/Install/WriteAll.pm
 lib/Mac/PropertyList/SAX.pm
 LICENSE
+Makefile.PL
 MANIFEST			This list of files
 MANIFEST.SKIP
 META.json

MANIFEST.SKIP

@@ -1,7 +1,6 @@
-\.github/workflows/.*
-\.git
-blib
-pm_to_blib
+\.git.*
+\bblib$
+\bpm_to_blib$
 .*\.bak
-Makefile
-MYMETA.(json|yml)
+\bMakefile$
+\bMYMETA.(json|yml)$