Mark main package.json as private to prevent accidental publishing (#293)

Author: IvanGoncharov

package.json

@@ -3,6 +3,7 @@
   "version": "0.6.0",
   "description": "A library to help construct a graphql-js server supporting react-relay.",
   "license": "MIT",
+  "private": true,
   "homepage": "https://github.com/graphql/graphql-relay-js",
   "bugs": {
     "url": "https://github.com/graphql/graphql-relay-js/issues"