fix: pin debug@~3.1.0 avoid deprecated warnning (#1245)

closes #1243

Author: fengmk2

package.json

@@ -27,7 +27,7 @@
     "content-disposition": "~0.5.2",
     "content-type": "^1.0.4",
     "cookies": "~0.7.1",
-    "debug": "^3.1.0",
+    "debug": "~3.1.0",
     "delegates": "^1.0.0",
     "depd": "^1.1.2",
     "destroy": "^1.0.4",