chore(package): update wait-on to version 4.0.1

Closes #158

Author: greenkeeper[bot]

package.json

@@ -73,7 +73,7 @@
     "react-test-renderer": "16.8.6",
     "redux-mock-store": "1.5.4",
     "storybook-addon-styled-component-theme": "1.2.5",
-    "wait-on": "3.3.0",
+    "wait-on": "4.0.1",
     "webpack": "^4.35.3",
     "webpack-bundle-analyzer": "3.6.0",
     "webpack-cli": "^3.3.2",