Update Appium dependency version to 1.20.2 (NPM 7)

[fluiddot]

Includes the changes from "Update lock file format version to version 2 (NPM 7)" PR.

Description

Appium dependency has included recently a fix for preventing an error when using NPM version 7 so it would be nice to update it.

How has this been tested?

Appium is used for running the end-to-end tests on the mobile version of the editor so for verifying that this is working it will require to run them.

Screenshots

N/A

Types of changes

Bug fix

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR.

[ockham]

Thanks! I was thinking we might be able to de-risk the npm 7 upgrade by getting the Appium upgrade in first? I.e. use npm 6 to upgrade Appium, and only then perform the npm 7 upgrade? Just in case we need to e.g. revert the npm 7 upgrade.

(Or maybe I'm overthinking it 😅 )

[fluiddot]

Thanks! I was thinking we might be able to de-risk the npm 7 upgrade by getting the Appium upgrade in first? I.e. use npm 6 to upgrade Appium, and only then perform the npm 7 upgrade? Just in case we need to e.g. revert the npm 7 upgrade.

(Or maybe I'm overthinking it 😅 )

Yeah, good idea, actually I'm preparing a PR for updating this dependency for NPM version 6 better.

[fluiddot]

I've created a PR with the update for NPM version 6. I'm going to close this PR since it won't be required.