Change the Node default version to resolve the DoS problem on Heroku (rauchg#327)

* Update splash.js

* Change the Node version to resolve the DoS problem on Heroku

* Undo translations to pt-BR

Author: davidalves1

package.json

@@ -43,7 +43,7 @@
     "supertest": "0.15.0"
   },
   "engines": {
-    "node": "4.5.0"
+    "node": "6.11.1"
   },
   "bin": {
     "slackin": "./bin/slackin"