fix: add children prop to ProviderProps and ThemeProviderProps

[flowck]

Description

After I had updated fela and react-fela to the version 12.1.1, I started getting the following error, in a Nextjs-based project and in a CRA-based project, both using Typescript.

'RendererProvider' cannot be used as a JSX component.
  Its instance type 'RendererProvider' is not a valid JSX element.
    Type 'RendererProvider' is missing the following properties from type 'ElementClass': render, context, setState, forceUpdate, and 3 more.

Example

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Packages

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• react-fela

Versioning

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Checklist

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Changes

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• Tests have been added/updated
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Name	Status	Preview	Updated
fela	✅ Ready (Inspect)	Visit Preview	May 3, 2022 at 11:49AM (UTC)

[robinweser]

Oh! How did this even work for such a long time 😅
Thanks a lot!

[firatgh]

@robinweser Thanks for acting on it rather quickly.

[robinweser]

Will be released tomorrow 👌