refactor(middleware/combine.ts): change exported function to 'functio…

…n declaration' (#3030)

src/middleware/combine.ts

@@ -2,17 +2,14 @@ import type { StateCreator, StoreMutatorIdentifier } from '../vanilla.ts'
 
 type Write<T, U> = Omit<T, keyof U> & U
 
-type Combine = <
+export function combine<
   T extends object,
   U extends object,
   Mps extends [StoreMutatorIdentifier, unknown][] = [],
   Mcs extends [StoreMutatorIdentifier, unknown][] = [],
 >(
   initialState: T,
-  additionalStateCreator: StateCreator<T, Mps, Mcs, U>,
-) => StateCreator<Write<T, U>, Mps, Mcs>
-
-export const combine: Combine =
-  (initialState, create) =>
-  (...a) =>
-    Object.assign({}, initialState, (create as any)(...a))
+  create: StateCreator<T, Mps, Mcs, U>,
+): StateCreator<Write<T, U>, Mps, Mcs> {
+  return (...a) => Object.assign({}, initialState, (create as any)(...a))
+}