Clean up types

[shuding]

This PR does 2 things:

1. The exported type ConfigInterface was changed in types: makes types fn and config and key more strictly #946, which might be breaking. However it's not released as stable yet. This PR fixes it.
2. Renames some types to be more consistent. Also marks the old ones as deprecated.

For 1, the cause is that properties in ConfigInterface are no longer optional. And if a user creates a custom hook the type might be broken:

import useSWR, { ConfigInterface } from 'swr'

function useData (opts: ConfigInterface) {
  return useSWR('/api', opts)
}

useData({}) // ← error because all fields are required

For 2, updated types are:

Current	New
keyInterface	Key
ConfigInterface	SWRConfiguration
responseInterface	SWRResponse
SWRInfiniteConfigInterface	SWRInfiniteConfiguration
SWRInfiniteResponseInterface	SWRInfiniteResponse
revalidateType	Revalidator
RevalidateOptionInterface	RevalidatorOptions
CacheInterface	Cache

The deprecated ones will be kept until 1.0.

[codesandbox-ci]

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Latest deployment of this branch, based on commit 4d9a0bf:

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

[huozhi]

I just encounter an issue like specifying the ConfigInterface in another PR. Could we consider exporting the paritial one?

export type ConfigInterface = Partial<{....}>

[shuding]

It is already the partial one: Partial<Configuration<Data, Error, Fn>>

[shuding]

Published as swr@0.4.3-beta.3.

[ivan-kleshnin]

Maybe also rename SWRConfig to SWRProvider?

SWRConfig (component) vs SWRConfiguration (type) – way too similar names.