🐛 fix:修复自定义属性自动添加的问题

README.md

@@ -18,7 +18,7 @@ A json-schema editor of high efficient and easy-to-use, base on Vue
   <img width="100%" src="https://github.com/zyqwst/json-schema-editor-vue/raw/master/examples/assets/capture.png">
 </p>
 
-**支持自定义属性，满足特殊的需求*
+**支持自定义属性，满足特殊的需求**
 
 <p align="center">
   <img width="100%" src="https://github.com/zyqwst/json-schema-editor-vue/raw/master/examples/assets/custom.png">
@@ -30,14 +30,12 @@ A json-schema editor of high efficient and easy-to-use, base on Vue
 **[国内Demo](http://json-schema-editor.sviip.com)**
 ### Usage
 
-```bash
 ```bash
 # vue2
 npm install json-schema-editor-vue
 # vue3 
 npm install json-schema-editor-vue3
 ```
-```
 
 ```vue
 import JsonSchemaEditor from 'json-schema-editor-vue'