chore(package): update qs to ^6.2.0

BREAKING CHANGE:

Drop support for old versions of Node (<4.0). Only Node LTS and stable are supported

Author: keithamus

.travis.yml

@@ -1,7 +1,7 @@
 language: node_js
 node_js:
-  - 0.1
-  - 0.11
+  - 4
+  - stable
 deploy:
   provider: npm
   email:

package.json

@@ -49,7 +49,7 @@
     "cookiejar": "2.0.x",
     "is-ip": "1.0.0",
     "methods": "^1.1.2",
-    "qs": "2.0.x",
+    "qs": "^6.2.0",
     "superagent": "^2.0.0"
   },
   "devDependencies": {