type: enforce array literal as tuple

[promer94]

In TypeScript > 4.9, if we use an array literal as key.

useSWR([{ a: '1', b: { c: '3' } }, [1231, '888']], arg => arg)

The arg will be infered as ((string | number)[] | { a: string; b: { c: string; }; })[]

This pr will enforce array literal to be infered as tuple. The type of args will be [{ a: string; b: { c: string; }; }, (string | number)[]]

[codesandbox-ci]

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Sandbox	Source
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SWR-States	Configuration
SWR-Infinite	Configuration
SWR-SSR	Configuration

[huozhi]

Is that possible to replace the Key with this?

[promer94]

Since we still need to support useSWR('/api') and useSWR({ foo: 'bar' }), we have to use different type here.

Maybe we could deprecated useSWR('/api') and useSWR({ foo: 'bar' }) in next major release ?

[huozhi]

Thanks!