chore(package): update express to version 4.17.1

Closes #199

Author: greenkeeper[bot]

package.json

@@ -94,7 +94,7 @@
     "eslint": "4.4.1",
     "eslint-config-wework": "3.0.0",
     "eslint-friendly-formatter": "2.0.7",
-    "express": "4.16.2",
+    "express": "4.17.1",
     "husky": "0.14.3",
     "imports-loader": "0.7.1",
     "json-loader": "0.5.7",