Update Makefile.PL

Fix rt bug #77968
https://rt.cpan.org/Public/Bug/Display.html?id=77968
Merge branch 'patch-3' of git://github.com/mrmuskrat/dbix-pg-callfunction into mrmuskrat-patch-3

Conflicts:
	Makefile.PL
Merge branch 'mrmuskrat-patch-3'