Update README.md

Huang ShuWei · web-flow · commit ed3f29c4e6b9 · 2021-04-21T09:21:13.000+08:00
diff --git a/README.md b/README.md
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 # vue-lazy-container
 
+[![npm](https://img.shields.io/npm/v/vue-lazy-container.svg)](https://www.npmjs.com/package/vue-lazy-container)
+
 **English** | [中文](./README-CN.md)
 
 ## Introduction
