Describe the bug
Attempting to display an animated webp image on iOS after loading it as a base64 encoded string. Works fine for Android but displays nothing on iOS.

To Reproduce

1. Import an animated webp image (ex. import sampleImg from 'path/image.webp';)
2. Use the imported image as a source for FastImage component (ex. {uri: sampleImg})

Expected behavior
Expect the image to be displayed and animated on both iOS and Android, but only works on Android.

Dependency versions

• React version: 16.8.6
• React Native version: 0.60
• React Native Fast Image version: 7.0.2