fix(package): update xhr to version 2.3.3

greenkeeper[bot] · greenkeeper[bot] · commit 3e5bc2a45150 · 2017-01-04T20:59:09.000Z
Closes #2 https://greenkeeper.io/
diff --git a/package.json b/package.json
@@ -20,7 +20,7 @@
   },
   "homepage": "https://github.com/bigpipe/plugin-xhr",
   "dependencies": {
-    "xhr": "~2.2.2"
+    "xhr": "~2.3.3"
   },
   "devDependencies": {
     "assume": "~1.4.1",
