fix(blueprints): rename package.json blueprints

Turns out npm now uses local package.json's "files" to determine
what contents of a subdirectory will be published.

Author: davewasmer

blueprints/addon/files/__name__/package.json blueprints/addon/files/__name__/package

@@ -65,7 +65,8 @@ export default class Blueprint extends Command {
    * Can be overriden/extended by individual addons
    */
   public static renamedFiles: any = {
-      gitignore: '.gitignore'
+      gitignore: '.gitignore',
+      package: 'package.json'
   };
 
   /**