ensure extra metadata is treated as v2.0 internally

diff --git a/Makefile.PL b/Makefile.PL
index f9338f5..3771f8a 100644 (file)
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -27,6 +27,7 @@ my %WriteMakefileArgs = (
   },
 
   META_ADD => {
+    'meta-spec' => { version => 2 },
     prereqs => {
       configure => {
         requires => {