Don't remove multiple lines from commit message

[skylord123]

I like to format my commit messages on multiple lines and currently the bot will only output the first line and only the first 80 characters of that line.

I would like to get the full message in there if possible. The whole point of the bot was so management in my company could see work being done and see the full messages without needing to go to gitlab to check it.

[tulir]

It won't be a built-in option since I don't think that's how most people use it, but I'll eventually make it possible to configure: #36