docs: add speed as feature, w/ link to benchmark

readme.md

@@ -21,6 +21,8 @@ const MyComponent = () => (
   [image](https://reactnative.dev/docs/image-style-props),
   [shadow](https://reactnative.dev/docs/shadow-props), and
   [text](https://reactnative.dev/docs/text-style-props)).
+- **very fast**--best performance of all RN styling libraries, according to
+  [this benchmark](https://github.com/efstathiosntonas/react-native-style-libraries-benchmark).
 - compatible with Tailwind CSS v3 and v2
 - respects your `tailwind.config.js` for full configuration
 - platform prefixes: `android:mt-4 ios:mt-2`