fix(deps): update dependency grunt-cli to v1

Author: renovate-bot

template/slides/reveal/plugin/multiplex/package.json

@@ -11,7 +11,7 @@
   },
   "dependencies": {
     "express": "4.13.4",
-    "grunt-cli": "0.1.13",
+    "grunt-cli": "1.4.3",
     "mustache": "2.2.1",
     "socket.io": "1.3.7"
   },