Issue with coffeescript upgrade

[youssefga]

When you runbin/hubot
you may get this error, depending on your coffeescript version

Github/hyperledger-rocket-chat-hubot/node_modules/hubot/src/brain.coffee:10:5:
error: Can't reference 'this' before calling super in derived class constructors
    @data =_

You may try to resolve this, but there are quite a few fixes to do. Downgrading coffeescript is quick and easy:

npm uninstall coffeescript
npm install -g [email protected]

I also got this error:
[Sat May 05 2018 00:39:50 GMT+0300 (EAT)] ERROR hubot-heroku-keepalive included, but missing HUBOT_HEROKU_KEEPALIVE_URL. heroku config:set HUBOT_HEROKU_KEEPALIVE_URL=$(heroku apps:info -s | grep web.url | cut -d= -f2)`

And one way to fix it is:
npm uninstall hubot-heroku-keepalive --save

Then go to the file: external-scripts.json and delete hubot-heroku-keepalive

run bin/hubot and it will work fine