chore(package): update node-sass to version 4.14.1

Closes #626

Author: greenkeeper[bot]

package.json

@@ -113,7 +113,7 @@
     "jest-fetch-mock": "3.0.0",
     "lint-staged": "9.5.0",
     "mini-css-extract-plugin": "0.9.0",
-    "node-sass": "4.13.0",
+    "node-sass": "4.14.1",
     "nodemon": "2.0.2",
     "npm-run-all": "4.1.5",
     "optimize-css-assets-webpack-plugin": "5.0.3",