Merge branch 'fix/mixed-setter' into 'release/1.0.0'

fix(editor-skeleton): fix dynamic setter support in mixed-setter

问题描述, 满足以下条件时：
1. prototype field 支持变量：`supportVariable = true `
2. setter是函数，且返回值是对象: `{ componentName: string; props: object }`

最终会实例化 MixedSetter，执行 setter 函数，但并未对返回内容做处理。

最终抛出错误：
```
Uncaught Invariant Violation: Objects are not valid as a React child (found: object with keys {componentName, props}). If you meant to render a collection of children, use an array instead.
```

See merge request !1001278

packages/editor-skeleton/src/components/mixed-setter/index.tsx

@@ -207,8 +207,14 @@ export default class MixedSetter extends Component<{
     const { setter, props } = currentSetter;
     let setterProps: any = {};
     let setterType: any;
+    let dynamicProps: any = {};
     if (isDynamicSetter(setter)) {
       setterType = setter.call(field, field);
+      // { componentName: string; props: object }
+      if (typeof setterType === 'object' && typeof setterType.componentName === 'string') {
+        dynamicProps = setterType.props || {};
+        setterType = setterType.componentName;
+      }
     } else {
       setterType = setter;
     }
@@ -224,6 +230,7 @@ export default class MixedSetter extends Component<{
       field,
       ...restProps,
       ...extraProps,
+      ...dynamicProps,
       onInitial: () => {
         this.handleInitial(currentSetter);
       },