docs: update readme

Author: Akryum

packages/vue-virtual-scroller/README.md

@@ -1,56 +1,42 @@
 # vue-virtual-scroller
 
 [![npm](https://img.shields.io/npm/v/vue-virtual-scroller.svg) ![npm](https://img.shields.io/npm/dm/vue-virtual-scroller.svg)](https://www.npmjs.com/package/vue-virtual-scroller)
-[![vue2](https://img.shields.io/badge/vue-2.x-brightgreen.svg)](https://vuejs.org/)
+[![vue2](https://img.shields.io/badge/vue-3.x-brightgreen.svg)](https://vuejs.org/)
 
 Blazing fast scrolling of any amount of data | [Live demo](https://akryum.github.io/vue-virtual-scroller/) | [Video demo](https://www.youtube.com/watch?v=Uzq1KQV8f4k)
 
-<p>
-  <a href="https://www.patreon.com/akryum" target="_blank">
-    <img src="https://c5.patreon.com/external/logo/become_a_patron_button.png" alt="Become a Patreon">
-  </a>
-</p>
+[💚️ Become a Sponsor](https://github.com/sponsors/Akryum)
 
 ## Sponsors
 
-
 [![sponsors logos](https://guillaume-chau.info/sponsors.png)](https://guillaume-chau.info/sponsors)
 
-## Table of contents
-
-- [Installation](#installation)
-- [Usage](#usage)
-  - [RecycleScroller](#recyclescroller)
-  - [DynamicScroller](#dynamicscroller)
-  - [DynamicScrollerItem](#dynamicscrolleritem)
-  - [IdState](#idstate)
-
 # Installation
 
 ```
-npm install --save vue-virtual-scroller
+npm install --save vue-virtual-scroller@next
 ```
 
-**⚠️ `vue-virtual-scroller` now uses [vue-observe-visibility](https://github.com/Akryum/vue-observe-visibility#installation) to automatically refresh itself when shown to prevent display glitches. This means you need to include the [Intersection Observer polyfill](https://github.com/w3c/IntersectionObserver/tree/master/polyfill) needed by `vue-observe-visibility` for this to work in old browsers (like Internet Explorer).**
+```
+yarn add vue-virtual-scroller@next
+```
 
 ## Default import
 
 Install all the components:
 
 ```javascript
-import Vue from 'vue'
 import VueVirtualScroller from 'vue-virtual-scroller'
 
-Vue.use(VueVirtualScroller)
+app.use(VueVirtualScroller)
 ```
 
 Use specific components:
 
 ```javascript
-import Vue from 'vue'
 import { RecycleScroller } from 'vue-virtual-scroller'
 
-Vue.component('RecycleScroller', RecycleScroller)
+app.component('RecycleScroller', RecycleScroller)
 ```
 
 **⚠️ The line below should be included when importing the package:**
@@ -68,16 +54,16 @@ import 'vue-virtual-scroller/dist/vue-virtual-scroller.css'
 <script src="vue-virtual-scroller/dist/vue-virtual-scroller.min.js"></script>
 ```
 
-If Vue is detected, the plugin will be installed automatically. If not, install the component:
+Install the component:
 
 ```javascript
-Vue.use(VueVirtualScroller)
+app.use(VueVirtualScroller)
 ```
 
 Or register it with a custom name:
 
 ```javascript
-Vue.component('RecycleScroller', VueVirtualScroller.RecycleScroller)
+app.component('RecycleScroller', VueVirtualScroller.RecycleScroller)
 ```
 
 # Usage