Update unexpected-documentation-site-generator to version 7.1.0

Author: depfu[bot]

package.json

@@ -21,7 +21,7 @@
     "nyc": "^15.0.0",
     "prettier": "~2.0.2",
     "unexpected": "^11.5.0",
-    "unexpected-documentation-site-generator": "^6.0.0",
+    "unexpected-documentation-site-generator": "^7.1.0",
     "unexpected-markdown": "^5.0.0"
   },
   "scripts": {