fix: Update initialState type to allow for lazy initialization

Author: davidwe

src/useSetState.ts

@@ -1,7 +1,7 @@
 import { useCallback, useState } from 'react';
 
 const useSetState = <T extends object>(
-  initialState: T = {} as T
+  initialState: T | (() => T) = {} as T
 ): [T, (patch: Partial<T> | ((prevState: T) => Partial<T>)) => void] => {
   const [state, set] = useState<T>(initialState);
   const setState = useCallback((patch) => {