add license to Makefile definitions

As recommended by Kwalitee indicator metayml_has_license.
Currently we specify public domain even though it's not listed in
Module::Build::Api and arguably not a valid license at all. Maybe change
our license later, or classify as 'unrestricted'.

diff --git a/Makefile.PL b/Makefile.PL
index e452030117c0c8fbcb40fd9f4c8a7a4c47cbb981..cdc50273d106fa0333f43fb2497871dd8c75391e 100644 (file)
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -11,5 +11,6 @@ WriteMakefile(
        VERSION_FROM  => 'PLP.pm',
        PREREQ_PM     => {},
        ABSTRACT_FROM => 'PLP.pm',
+       (LICENSE      => 'public domain') x ($ExtUtils::MakeMaker::VERSION > 6.30),
        AUTHOR        => 'Mischa POSLAWSKY <perl@shiar.org>',
 );