Merge pull request #1985 from frankleng/master_qs

add qs to package.json

Author: Sabra Pratt

package.json

@@ -27,6 +27,7 @@
   "dependencies": {
     "history": "^1.9.0",
     "invariant": "^2.0.0",
+    "qs": "^5.1.0",
     "warning": "^2.0.0"
   },
   "devDependencies": {