Replace 'qs' dep. with 'querystring'

package.json

@@ -74,7 +74,7 @@
     "matrix-js-sdk": "0.8.5",
     "optimist": "^0.6.1",
     "prop-types": "^15.5.8",
-    "qs": "^6.5.1",
+    "querystring": "^0.2.0",
     "react": "^15.4.0",
     "react-addons-css-transition-group": "15.3.2",
     "react-dom": "^15.4.0",

src/components/views/elements/AppTile.js

@@ -17,7 +17,7 @@ limitations under the License.
 'use strict';
 
 import url from 'url';
-import qs from 'qs';
+import qs from 'querystring';
 import React from 'react';
 import MatrixClientPeg from '../../../MatrixClientPeg';
 import PlatformPeg from '../../../PlatformPeg';