chore(package): update superagent to 3.7 (#183)

Author: LEQADA

package.json

@@ -51,7 +51,7 @@
     "is-ip": "1.0.0",
     "methods": "^1.1.2",
     "qs": "^6.2.0",
-    "superagent": "^3.3.0"
+    "superagent": "^3.7.0"
   },
   "devDependencies": {
     "simplifyify": "^2.0.1",