Bump version to 2.19.12.

portlint.pl

@@ -49,7 +49,7 @@ $portdir = '.';
 # version variables
 my $major = 2;
 my $minor = 19;
-my $micro = 11;
+my $micro = 12;
 
 # default setting - for FreeBSD
 my $portsdir = '/usr/ports';