WIP: Ruby2.7 support

[numbata]

This PR suppress some Ruby2.7 warnings.

[mcmire]

Hey, thanks for doing this! Did you want to leave your commits as-is or squash them? Just making sure before I merge.

[mcmire]

Also it looks like @aried3r got to this first so I merged in their PR — hope that's okay. I'm assuming that the other changes here have to do with upgrading to Ruby 2.7, though? Or are they to satisfy Rubocop?

[numbata]

Also it looks like @aried3r got to this first so I merged in their PR — hope that's okay.

Sure 👍

I'm assuming that the other changes here have to do with upgrading to Ruby 2.7, though? Or are they to satisfy Rubocop?

Yeap, Ruby 2.7 shows some warnings right now. "warning: Using the last argument as keyword parameters is deprecated" for example. So, my changes are around suppressing that deprications and warnings.

Did you want to leave your commits as-is or squash them? Just making sure before I merge.

I'll do it. Just want to fix couple of warnings before that.

[mcmire]

Hey, just checking here. Was there any more work you wanted to do on this?

[numbata]

@mcmire thank you for your "ping" :) I'll check and back with results tomorrow.

[numbata]

@mcmire So, I did fix what I can. Other warnings are coming from the "rspec-expectations" and the "attr_extras" gems.

[mcmire]

Okay! Thanks so much for doing this!