chore: Add note to readme.

Author: DylanVann

README.md

@@ -57,6 +57,8 @@ and
 
 ## Usage
 
+**Note: You must be using React Native 0.60.0 or higher to use the most recent version of `react-native-fast-image`.**
+
 ```bash
 yarn add react-native-fast-image
 ```