New release about appraisal

[nickcharlton]

Thanks for poking me.

I'll take a look today (…worse it'll be tomorrow if I run out of time) but I think we can probably do a minor release now. I'd been holding off because we've not made much/enough progress on handling newer Bundler versions, but I think this must be causing us all enough annoyance.

[nijikon]

@nickcharlton yes, the minor would be ideal. Thank you very much for your work on this project 💜

[nijikon]

cc @nickcharlton

[xjunior]

Furthermore, I'm trying to use customize_gemfile as shown on the main page of this project, and it's only present on the unreleased version.