Adding onLongPress to ListItem

[lxwbr]

Added functionality for listening for long press on a ListItem.

• Make sure that you follow antd's code convention.
• Run npm run lint and fix those errors before submitting in order to keep consistent code style.
• Rebase before creating a PR to keep commit history clear.
• Add some descriptions and refer relative issues for you PR.

Extra checklist:

• Update API docs for the component.
• Update/Add demo to demonstrate new feature.
• Update TypeScript definition for the component.
• Add unit tests for the feature.

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This change is 

[pingan1927]

仅支持rn的话，文档需要更新下

[silentcloud]

@Zunder 把 web 的也加上吧 https://github.com/react-component/touchable#api

要保持 API 一致性

[paranoidjk]

ping @Zunder

[paranoidjk]

先合掉，web 和 文档我来更新。

[laukaichung]

@paranoidjk @silentcloud
Does List.Item support onLongPress in 2.16?
I couldn't find any mention of it in the typescript definition files.

[laukaichung]

Any progress on this?

[paranoidjk]

@stonecold123 onLongPress api is removed in antd-mobile@2, you can use below 2 components to wrap your List.Item children to implement long press feature.

• you can use rc-gesture, which have onPress, onPressOut api.
• you can use rc-touchable, which have onLongPress API

cc @silentcloud