Bump rive-ios to v6.2, rive-android to 9.9.5, and remove iOS Skia support

[lancesnider]

Breaking change: rive-react-native no longer supports the Skia renderer for iOS.

Testing Examples:

1. Run yarn bootstrap
2. Run yarn example start
3. When Expo is ready, click i to start an iOS simulator

You might have an issue where Expo tries to run on a previously used device, rather than a Simulator. If that happens, run yarn example ios --simulator="iPhone 15" (or whatever device).

Testing with a new Expo project:

1. In rive-react-native run npm pack which will create rive-react-native-8.0.0.tgz
2. Create a new expo project and prebuild (formerly eject) it: https://docs.expo.dev/
3. In Podfile set the minimum platform to 14: platform :ios, podfile_properties['ios.deploymentTarget'] || '14.0'
4. Add this to your package.json dependencies: "rive-react-native": "file:../rive-react-native/rive-react-native-8.0.0.tgz" (adjust the path if needed) and run npm i
5. Add a Rive component index.tsx and run npm run start:

import Rive, { Alignment, Fit, RiveRef } from 'rive-react-native'
...
<Rive
    url='https://cdn.rive.app/animations/vehicles.riv'
    fit={Fit.Contain}
    alignment={Alignment.Center}
    artboardName={'Truck'}
    style={{ width: 200, height: 200 }}
    autoplay={true}
  />

[HayesGordon]

Awesome, @lancesnider. We should bump Android as well. Due to recent changes, I think some native code will also need to be updated. I can do that, or if you're interested, we can hop on a call, and I'll show you.

[lancesnider]

Awesome, @lancesnider. We should bump Android as well. Due to recent changes, I think some native code will also need to be updated. I can do that, or if you're interested, we can hop on a call, and I'll show you.

@HayesGordon Yes, please!

[dskuza]

We now have v6.2.1 which fixes some potentials for crashes on iOS, might want to bump the bump!

[lancesnider]

Thanks. Added the newer version. I also make this section of the docs generic (x.x.x) so we don't have to keep updating it every time.

[lancesnider]

Not totally related to this PR, but I use npm pack a lot to test this package in other repos and I don't want to accidentally commit the .tgz.

[HayesGordon]

nice

[HayesGordon]

LGTM! Thanks for getting this in!