chore(package): update cross-env to version 2.0.0 (parse-community#2271)

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -57,7 +57,7 @@
     "babel-preset-stage-0": "6.5.0",
     "babel-register": "6.8.0",
     "codecov": "1.0.1",
-    "cross-env": "1.0.7",
+    "cross-env": "2.0.0",
     "deep-diff": "0.3.4",
     "gaze": "1.1.0",
     "jasmine": "2.4.1",