chore(deps): update dependency grunt-contrib-jshint to v3

Author: renovate-bot

package.json

@@ -65,7 +65,7 @@
     "git-issues": "1.3.1",
     "grunt": "0.4.5",
     "grunt-cli": "0.1.13",
-    "grunt-contrib-jshint": "1.1.0",
+    "grunt-contrib-jshint": "3.1.1",
     "grunt-deps-ok": "0.9.0",
     "grunt-nice-package": "0.10.4",
     "jshint-summary": "0.4.0",