fix(components): 增加 slot typings

packages/taro-components/types/Slot.d.ts

@@ -0,0 +1,39 @@
+import { ComponentType } from 'react'
+
+interface SlotProps {
+  /** 指定插入的 slot 位置
+   * @default none
+   * @supported weapp, swan, alipay, tt, jd, qq
+   */
+  name?: string,
+  /** scoped slot 传入数据源
+   * @default none
+   * @supported swan
+   */
+  varName?: string
+}
+
+/** slot 插槽
+ * @supported weapp, swan, alipay, tt, jd, qq
+ * @example
+ * ```tsx
+ * import { Slot, View, Text } from '@tarojs/components'
+ * 
+ * export default class SlotView extends Component {
+ *   render () {
+ *     return (
+ *       <View>
+ *         <custom-component>
+ *           <Slot name='title'>
+ *            <Text>Hello, world!</Text>
+ *           </Slot>
+ *         </custom-component>
+ *       </View>
+ *     )
+ *   }
+ * }
+ * ```
+ */
+declare const Slot: ComponentType<SlotProps>
+
+export { Slot, SlotProps }

packages/taro-components/types/index.d.ts

@@ -42,5 +42,6 @@ export { WebView } from './WebView'
 export { OfficialAccount } from './OfficialAccount'
 export { NavigationBar } from './NavigationBar'
 export { PageMeta } from './PageMeta'
+export { Slot } from './Slot'
 export * from './common'
 export * from './event'