chore: update readme

Author: achingbrain

README.md

@@ -2,7 +2,7 @@
 
 Very basic support so far, just js-libp2p itself, no extra modules yet.
 
-1. Turn on exports map support
+1. Turn on [exports map support](https://reactnative.dev/blog/2023/06/21/package-exports-support)
 
 ```js
 // metro.config.js
@@ -15,11 +15,7 @@ module.exports = {
 
 2. Shimming globals
 
-Some standard JS APIs aren't available in React Native:
-
-   1. `crypto.getRandomValues` - `react-native-get-random-values`
-   2. `TextEncoder`/`TextDecoder` - `text-encoding`
-   3. `EventTarget`/`Event` - `event-target-shim`
+Some standard JS APIs aren't available in React Native, these need to be polyfilled, hopefully [not forever](https://github.com/facebook/hermes/discussions/1072).
 
 ```js
 // globals.js - this should be imported at the top of your App.js file