Fix testing

[woxtu]

📲 What

This PR runs bundle lock --add-platform x86_64-darwin-20 and tries to fix testing.

🤔 Why

A failed log says:

Your bundle only supports platforms ["arm64-darwin-20", "universal-darwin-21",
"x86_64-darwin-19"] but your local platform is x86_64-darwin-20. Add the current
platform to the lockfile with `bundle lock --add-platform x86_64-darwin-20` and
try again.

https://github.com/criticalmaps/criticalmaps-ios/actions/runs/4791748214/jobs/8526593053?pr=469

[mltbnz]

@woxtu thanks for your contributions.

Says in your GitHub profile you are based in Tokyo. I was winding if there is also a critical mass there?

[woxtu]

@mltbnz Sorry, could you please use simpler words?

[mltbnz]

Sorry. Is there a critical mass in Tokyo?

[woxtu]

Thanks, I got it. I've never seen it but it seems that there is.