Update express to version 4.17.1

Author: depfu[bot]

package.json

@@ -33,7 +33,7 @@
     "clipboardy": "^1.2.3",
     "compression": "^1.7.4",
     "cross-env": "^5.2.0",
-    "express": "^4.16.4",
+    "express": "^4.17.1",
     "fs-extra": "^7.0.0",
     "hash-sum": "^1.0.2",
     "loader-utils": "^1.1.0",