Add types for render function

[cheyer]

Hi there 👋

I've been working with Vue3 / Storybook / Testing Library, and wondered why the props and slots typings work in Storybook. So I took inspiration in Storybook and added typings for the render function in vue testing library accordingly.

What has been changed

• added necessary deps
• added type for render function component props
• added type for render function component slots (ComponentSlots by vue-component-type-helpers by itself was not sufficient enough, since it does not allow slots of type string (e.g. slots: { default: 'Test' }), that's why we need the Typescript magic that Storybook uses)

Reference:
https://github.com/storybookjs/storybook/blob/ba69532715f162567cc17aa3a0de8ca918dfdd2c/code/renderers/vue3/src/public-types.ts#L63-L69

[afontcu]

This is great, thank you!

[afontcu]

build is failing due to some lint errors, would you mind taking a look?

[cheyer]

build is failing due to some lint errors, would you mind taking a look?

Thanks for the review! The linting error should be fixed now!

[github-actions]

🎉 This PR is included in version 8.1.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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