Support for macOS apps, multiple platforms for pilot & more

* Identify iMessage screenshots, fixes #7366 (#7399)
* Teach pilot about apps with multiple platforms (#7267)
* Add platform parameter to spaceship iTC client (#7328)
* Add support for macOS apps (#7180)
* Upgrade fastimage, fixes #7370 (#7401)

https://github.com/fastlane-old/spaceship/releases/tag/0.39.0
