js1 metro-bundler: add script to publish new version

Reviewed By: davidaurelio

Differential Revision: D6019220

fbshipit-source-id: 97bb53323b29609e192f0e4f4d79b6be6440b98e

package.json

@@ -162,7 +162,7 @@
     "graceful-fs": "^4.1.3",
     "inquirer": "^3.0.6",
     "lodash": "^4.16.6",
-    "metro-bundler": "^0.19.0",
+    "metro-bundler": "^0.20.0",
     "mime": "^1.3.4",
     "minimist": "^1.2.0",
     "mkdirp": "^0.5.1",