Tweak README ready for v3 release

Author: chrisbianca

README.md

@@ -5,13 +5,13 @@ A set of reusable [React Hooks](https://reactjs.org/docs/hooks-intro.html) for [
 [![npm version](https://img.shields.io/npm/v/react-firebase-hooks.svg?style=flat-square)](https://www.npmjs.com/package/react-firebase-hooks)
 [![npm downloads](https://img.shields.io/npm/dm/react-firebase-hooks.svg?style=flat-square)](https://www.npmjs.com/package/react-firebase-hooks)
 
-> Official support for Hooks was added to React Native in v0.59.0. React Firebase Hooks works with both the Firebase JS SDK and React Native Firebase, although some of the Flow and Typescript typings may be incorrect - we are investigating ways to improve this for React Native Firebase users.
-
-**This documentation is for v2 of React Firebase Hooks which involved a number of breaking changes, including switching from `Object` to `Array` returns - more details [here](https://github.com/CSFrequency/react-firebase-hooks/releases/tag/v2.0.0). For v1 documentation, see [here](https://github.com/CSFrequency/react-firebase-hooks/tree/v1.2.1).**
+**This documentation is for v3 of React Firebase Hooks which involved a number of breaking changes, including adding support for Firebase v8.0.0 - more details [here](https://github.com/CSFrequency/react-firebase-hooks/releases/tag/v3.0.0). For v2 documentation, see [here](https://github.com/CSFrequency/react-firebase-hooks/tree/v2.2.0).**
 
 ## Installation
 
-React Firebase Hooks requires **React 16.8.0 or later** and **Firebase v5.0.0 or later**.
+React Firebase Hooks v3 requires **React 16.8.0 or later** and **Firebase v8.0.0 or later**.
+
+> Official support for Hooks was added to React Native in v0.59.0. React Firebase Hooks works with both the Firebase JS SDK and React Native Firebase, although some of the typings may be incorrect.
 
 ```
 npm install --save react-firebase-hooks
@@ -25,11 +25,9 @@ There has been a **lot** of hype around React Hooks, but this hype merely reflec
 
 This library explores how React Hooks can work to make integration with Firebase even more straightforward than it already is. It takes inspiration for naming from RxFire and is based on an internal library that we had been using in a number of apps prior to the release of React Hooks. The implementation with hooks is 10x simpler than our previous implementation.
 
-## Upgrading from v1 to v2
-
-After feedback on the initial release of React Firebase Hooks, we opted to change from `Object` to `Array` returns to allow for easier composition of hooks in v2.
+## Upgrading from v2 to v3
 
-To upgrade your project from v1 to v2 check out the [Release Notes](https://github.com/CSFrequency/react-firebase-hooks/releases/tag/v2.0.0) which have full details of everything that needs to be changed.
+To upgrade your project from v2 to v3 check out the [Release Notes](https://github.com/CSFrequency/react-firebase-hooks/releases/tag/v3.0.0) which have full details of everything that needs to be changed.
 
 ## Documentation