Update load-grunt-tasks.

package.json

@@ -47,7 +47,7 @@
     "grunt-jscs-checker": "~0.3.0",
     "grunt-saucelabs": "~5.0.0",
     "grunt-sed": "~0.1.1",
-    "load-grunt-tasks": "~0.3.0",
+    "load-grunt-tasks": "~0.4.0",
     "markdown": "~0.5.0",
     "css-flip": "~0.3.0"
   },