Update README.md

Author: sc0Vu

README.md

@@ -5,24 +5,32 @@ A small wrapper for integrating axios to Vuejs
 
 |VueJS \ VueAxios|1.x|2.x|3.x|
 |-|-|-|-|
-|1.x|✔|✔|❌|
-|2.x|✔|✔|❌|
-|3.x|❌|❌|✔|
+|1.x|✔|✔|✔|
+|2.x|✔|✔|✔|
+|3.x|✔|✔|✔|
 
 ## How to install:
 ### ES6 Module:
 ```bash
 npm install --save axios vue-axios
 ```
-
-And in your entry file:
+Import libraries in entry file:
 ```js
 import Vue from 'vue'
 import axios from 'axios'
 import VueAxios from 'vue-axios'
+```
+
+Usage in Vue 2:
+```js
+Vue.use(VueAxios, axios)
+```
 
+Usage in Vue 3:
+```js
 const app = Vue.createApp(...)
 app.use(VueAxios, axios)
+app.mount('#app')
 ```
 
 ### Script: