Update JSXHint dep

Author: mjackson

package.json

@@ -27,7 +27,7 @@
     "bundle-loader": "^0.5.2",
     "events": "1.0.2",
     "expect": "^1.1.0",
-    "jsxhint": "^0.8.1",
+    "jsxhint": "^0.12.1",
     "karma": "^0.12.28",
     "karma-chrome-launcher": "^0.1.7",
     "karma-cli": "0.0.4",