Merge pull request #32 from push2cloud/greenkeeper-shelljs-0.7.4

Update shelljs to version 0.7.4 🚀

Author: adrai

package.json

@@ -33,7 +33,7 @@
     "mkdirp": "0.5.1",
     "request": "2.74.0",
     "rimraf": "2.5.4",
-    "shelljs": "0.7.3",
+    "shelljs": "0.7.4",
     "underscore.string": "3.3.4",
     "write-json-file": "2.0.0"
   }