CachedImageBackground -- ImageBackground not available on RN 0.45

[peacechen]

ImageBackground was introduced in RN 0.46 and is unavailable in RN 0.45 or prior. I can use CachedImage for now, but it outputs a warning message which is inconvenient (and falsely alarms testers). Would you be open to a PR that conditionally outputs the warning based on RN version?

ImageBackground not present in RN 0.45

[mienaikoe]

On RN 0.55, this throws an exception. Could really use a CachedImageBackground

[simonbuerger]

I've just switched to using CustomCahcedImage

<CustomCachedImage source={{ uri: 'https://some/image/source' }} component={ImageBackground}><Text>Some text</Text></CustomCachedImage>