Bump version to 5.18.0-RC0

This was done with:

  ./perl -Ilib Porting/bump-perl-version -i 5.17.12 5.18.0

Followed by two tiny manual edits: INSTALL and patchlevel.h

1 files changed, 1 insertions, 1 deletions

diff --git a/META.json b/META.json
index efe4de11b2..da5ed9725b 100644
--- a/META.json
+++ b/META.json
@@ -131,5 +131,5 @@
          "url" : "http://perl5.git.perl.org/"
       }
    },
-   "version" : "5.017012"
+   "version" : "5.018000"
 }