Attempt to get Travis to deploy to npmjs (#6457)

* Use deprecated skip_cleanup
as cleanup: false doesn't
appear to be working

* prepare release

* revert change to branch

package.json

@@ -1,6 +1,6 @@
 {
   "name": "parse-server",
-  "version": "4.0.1",
+  "version": "4.0.2",
   "description": "An express module providing a Parse-compatible API server",
   "main": "lib/index.js",
   "repository": {