Update express to the latest version 🚀 (#1090)

* fix(package): update express to version 4.17.1

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

Author: greenkeeper[bot]

package-lock.json

@@ -41,7 +41,7 @@
     "cookie-session": "2.0.0-beta.3",
     "create-react-class": "15.6.3",
     "csurf": "1.10.0",
-    "express": "4.17.0",
+    "express": "4.17.1",
     "history": "4.9.0",
     "immutable": "3.8.1",
     "immutable-devtools": "0.1.3",