[ez] Update useMemoCache return type

packages/react-debug-tools/src/ReactDebugHooks.js

@@ -560,7 +560,7 @@ function useId(): string {
 
 // useMemoCache is an implementation detail of Forget's memoization
 // it should not be called directly in user-generated code
-function useMemoCache(size: number): Array<any> {
+function useMemoCache(size: number): Array<mixed> {
   const fiber = currentFiber;
   // Don't throw, in case this is called from getPrimitiveStackCache
   if (fiber == null) {

packages/react-reconciler/src/ReactFiberHooks.js

@@ -1199,7 +1199,7 @@ function use<T>(usable: Usable<T>): T {
   throw new Error('An unsupported type was passed to use(): ' + String(usable));
 }
 
-function useMemoCache(size: number): Array<any> {
+function useMemoCache(size: number): Array<mixed> {
   let memoCache = null;
   // Fast-path, load memo cache from wip fiber if already prepared
   let updateQueue: FunctionComponentUpdateQueue | null =

packages/react-server/src/ReactFizzHooks.js

@@ -792,7 +792,7 @@ function useCacheRefresh(): <T>(?() => T, ?T) => void {
   return unsupportedRefresh;
 }
 
-function useMemoCache(size: number): Array<any> {
+function useMemoCache(size: number): Array<mixed> {
   const data = new Array<any>(size);
   for (let i = 0; i < size; i++) {
     data[i] = REACT_MEMO_CACHE_SENTINEL;

packages/react/src/ReactHooks.js

@@ -212,7 +212,7 @@ export function use<T>(usable: Usable<T>): T {
   return dispatcher.use(usable);
 }
 
-export function useMemoCache(size: number): Array<any> {
+export function useMemoCache(size: number): Array<mixed> {
   const dispatcher = resolveDispatcher();
   // $FlowFixMe[not-a-function] This is unstable, thus optional
   return dispatcher.useMemoCache(size);