Update qunitjs to version 1.22.0

Closes js-cookiegh-142.

Author: greenkeeperio-bot

package.json

@@ -38,7 +38,7 @@
     "grunt-jscs": "2.7.0",
     "grunt-saucelabs": "8.6.2",
     "gzip-js": "0.3.2",
-    "qunitjs": "1.21.0",
+    "qunitjs": "1.22.0",
     "requirejs": "2.1.22"
   }
 }