chore(package): update lighthouse to version 5.3.0

Closes #339

Author: greenkeeper[bot]

package.json

@@ -51,7 +51,7 @@
     "html-webpack-exclude-assets-plugin": "0.0.7",
     "html-webpack-plugin": "3.2.0",
     "http-server": "0.11.1",
-    "lighthouse": "4.1.0",
+    "lighthouse": "5.3.0",
     "postcss": "7.0.14",
     "postcss-cssnext": "3.1.0",
     "postcss-custom-media": "7.0.7",