style 绑定在webpack打包后会被移除

`

import san from 'san';

export default san.defineComponent({
initData() {
return {
color: '#000'
};
},
computed: {
mainStyle: function () {
const style = {} as any;
const color = this.data.get('color');
style.color = color;
return style;
}
}
});

.app {
width: 100%;
height: 100%;
overflow: hidden;

.content {
width: 100%;
height: 100%;
overflow: hidden;
}
}
`

如上代码，开发环境没问题，但是 webpack5 打包后，div style 中的样式丢失了，@erik168 能不能帮忙看看呀？谢谢！

Start with the provided San template and TypeScript component, then compare the development result with a webpack 5 production build. Trace the style binding for the computed mainStyle value; done means the color style remains on the div after bundling.

Written by the indexing model from the issue text.