Update grunt-saucelabs version

Author: kevin-brown

package.json

@@ -57,6 +57,6 @@
     "grunt-gh-pages": "^0.9.1",
     "grunt-jekyll": "^0.4.2",
     "grunt-sass": "^1.0.0",
-    "grunt-saucelabs": "^8.5.0"
+    "grunt-saucelabs": "^8.6.0"
   }
 }