Changed to more strict sinon version to work around issue in latest sinon

package.json

@@ -62,6 +62,6 @@
     "grunt-jscs": "~1.5.x",
     "karma-sinon": "^1.0.3",
     "lodash": "^2.4.1",
-    "sinon": "^1.10.3"
+    "sinon": "1.10.3"
   }
 }