🤔 [QUESTION] IconImageLayer选中后如何改变icon颜色

### 🐛 Question description [Please make everyone to understand it]
请问IconImageLayer选中后如何改变icon颜色，尝试了在select中设置color和fillColor都没有效果

### 💻 Link to minimal reproduction

https://codesandbox.io/s/mh8gf8

### 🏞 Expected result

点击图标后变成红色

### 🚑 Any additional [like screenshots]

- **L7Plot Version**:0.5.9
- **Platform**:windows edge

Start with the linked CodeSandbox and the IconImageLayer selection behavior in L7Plot 0.5.9, tracing how the select options handle color and fillColor. Confirm whether selecting an icon can produce the expected red appearance, and document the supported configuration or the reproduced limitation.

Written by the indexing model from the issue text.