Adding ruby linting to the CI checks to ensure styling is consistent

[edwinthinks]

I'am wondering if we want to utilize some linting library like https://github.com/rubocop/rubocop or https://github.com/testdouble/standard?

This can help keep our code consistent.

[edwinthinks]

@freestylebit @chriszimmerman thoughts?

[chriszimmerman]

I'm using rubocop at my current job and I love it. Using an automated linter gets rid of a class of problems so I'm in full support of adding one. I think it would be valuable to have a JS one as well.

[freestylebit]

Yep, let's do this! I used rubocop previously with good results, too!