Setting version to prerelease 0.13.0-0.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "grunt-init-amber",
-  "version": "0.13.0-pre1",
+  "version": "0.13.0-0",
   "description": "grunt-init template for amber project",
   "main": "template.js",
   "scripts": {