Update dependencies to enable Greenkeeper 🌴 (#3940)

* chore(package): update dependencies

* docs(readme): add Greenkeeper badge

* Fix indent issues with eslint 4.0

see http://eslint.org/docs/user-guide/migrating-to-4.0.0\#-the-indent-rule-is-more-strict

src/Push/utils.js

@@ -24,7 +24,7 @@ export function validatePushType(where = {}, validPushTypes = []) {
     var deviceType = deviceTypes[i];
     if (validPushTypes.indexOf(deviceType) < 0) {
       throw new Parse.Error(Parse.Error.PUSH_MISCONFIGURED,
-                            deviceType + ' is not supported push type.');
+        deviceType + ' is not supported push type.');
     }
   }
 }