- Add source-map-support.

Thanks to xet7 !

Closes #1889

package.json

@@ -30,6 +30,7 @@
     "os": "^0.1.1",
     "page": "^1.8.6",
     "qs": "^6.5.2",
+    "source-map-support": "^0.5.9",
     "xss": "^1.0.3"
   }
 }