chore(deps): update dependency express to v4.17.0 (#403)

Author: renovate[bot]

package-lock.json

@@ -52,7 +52,7 @@
     "eslint": "5.16.0",
     "eslint-plugin-import": "2.17.2",
     "eslint-plugin-prettier": "3.1.0",
-    "express": "4.16.4",
+    "express": "4.17.0",
     "file-loader": "3.0.1",
     "husky": "2.3.0",
     "jest": "24.8.0",