Update package.json.

* "grunt-jscs-checker" was renamed to "grunt-jscs"
* update deps

package.json

@@ -51,8 +51,8 @@
     "grunt-exec": "~0.4.5",
     "grunt-html-validation": "~0.1.18",
     "grunt-jekyll": "~0.4.2",
-    "grunt-jscs-checker": "~0.6.1",
-    "grunt-saucelabs": "~8.1.0",
+    "grunt-jscs": "~0.6.1",
+    "grunt-saucelabs": "~8.1.1",
     "grunt-sed": "~0.1.1",
     "load-grunt-tasks": "~0.6.0",
     "markdown": "~0.5.0",