fix: remove permissive type

[wcatron]

Resolve #2758 by remove permissive type. Because BaseFetcher allows (...args: any) when your key and fetcher key mismatch you fall through to the override:

<Data = any, Error = any>(
     key: Key,
     fetcher: BareFetcher<Data> | null
   ): SWRResponse<Data, Error>

This should instead be flagged by typescript. Removing that override broke some tests added in #1640 which appeared to be designed to allow for backwards compatible hooks that don't conform to StrictKey to be compatible. Specifically these two type tests:

useSWR<{ id: number }>('/api/', () => ({ id: 123 }))
useSWR<string, any>('/api/', (key: string) => key)

The new override covers these while retaining type inference by just not defaulting to StrictKey which appears to be the main issue.

[orca-security-us]

Orca Security Scan Summary

Status	Check	Issues by priority
Passed	Secrets	0   0   0   0	View in Orca

[codesandbox-ci]

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

[promer94]

Thank you!