update for npm badge

Author: Tim M

README.md

@@ -1,6 +1,6 @@
 # postgraphile-plugin-many-create-update-delete
 
-<!-- ![npm](https://img.shields.io/npm/v/postgraphile-plugin-many-create-update-delete) -->
+![npm](https://img.shields.io/npm/v/postgraphile-plugin-many-create-update-delete)
 [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg?style=flat-square)](http://makeapullrequest.com)
 
 This plugin implements mutations that allow many creates, updates, and deletes in a single transaction.