Add the installation about ants v2

README.md

@@ -44,10 +44,18 @@ Library `ants` implements a goroutine pool with fixed capacity, managing and rec
 
 ## How to install
 
-``` sh
+### For `ants` v1
+
+``` powershell
 go get -u github.com/panjf2000/ants
 ```
 
+### For `ants` v2
+
+```powershell
+go get -u github.com/panjf2000/ants/v2
+```
+
 ## How to use
 Just take a imagination that your program starts a massive number of goroutines, resulting in a huge consumption of memory. To mitigate that kind of situation, all you need to do is to import `ants` package and submit all your tasks to a default pool with fixed capacity, activated when package `ants` is imported:
 

README_ZH.md

@@ -42,13 +42,20 @@ A goroutine pool for Go
 <img width="1028" alt="ants" src="https://user-images.githubusercontent.com/7496278/66307062-f6859980-e935-11e9-9f30-241c348cbc33.png">
 </p>
 
-
 ## 安装
 
-``` sh
+### 使用 `ants` v1 版本:
+
+``` powershell
 go get -u github.com/panjf2000/ants
 ```
 
+### 使用 `ants` v2 版本:
+
+```powershell
+go get -u github.com/panjf2000/ants/v2
+```
+
 ## 使用
 写 go 并发程序的时候如果程序会启动大量的 goroutine ，势必会消耗大量的系统资源（内存，CPU），通过使用 `ants`，可以实例化一个协程池，复用 goroutine ，节省资源，提升性能：