Update cross-env to the latest version 🚀 (#1262)

* chore(package): update cross-env to version 5.2.1

* chore(package): update lockfile package-lock.json

Author: greenkeeper[bot]

package-lock.json

@@ -80,7 +80,7 @@
     "babel-loader": "8.0.6",
     "babel-plugin-transform-object-rest-spread": "6.26.0",
     "core-js": "3.2.1",
-    "cross-env": "5.2.0",
+    "cross-env": "5.2.1",
     "css-loader": "3.2.0",
     "eslint": "6.3.0",
     "eslint-plugin-jest": "22.16.0",