Upgrade dev dependency jshint

Author: rjmunro

package.json

@@ -51,7 +51,7 @@
     "chai": "4.1.2",
     "istanbul": "0.4.5",
     "jscs": "1.13.1",
-    "jshint": "2.8.0",
+    "jshint": "2.9.5",
     "mocha": "2.2.5"
   },
   "license": "MIT"