CHANGED: The jsdom dependency to ~3.1.2.

This allows versions of node <= 0.12.0 to use this project as jsdom 4.X > require node 4.X >

package.json

@@ -67,7 +67,7 @@
     "react": "0.13.x || 0.14.x"
   },
   "optionalDependencies": {
-    "jsdom": "^6.1.0",
+    "jsdom": "~3.1.2",
     "mocha-jsdom": "^1.0.0"
   }
 }