re-export InfiniteFetcher (vercel#1728)

Author: shuding

infinite/index.ts

@@ -272,10 +272,17 @@ export const infinite = (<Data, Error>(useSWRNext: SWRHook) =>
   }) as unknown as Middleware
 
 export default withMiddleware(useSWR, infinite) as SWRInfiniteHook
+
 export {
   SWRInfiniteConfiguration,
   SWRInfiniteResponse,
   SWRInfiniteHook,
   SWRInfiniteKeyLoader,
   SWRInfiniteFetcher
 }
+
+// @TODO: remove this in 2.0
+/**
+ * @deprecated `InfiniteFetcher` will be renamed to `SWRInfiniteFetcher`.
+ */
+export type InfiniteFetcher = SWRInfiniteFetcher