chore: be compitable to ts5.6

packages/rspack/src/Compilation.ts

@@ -410,7 +410,7 @@ BREAKING CHANGE: Asset processing hooks in Compilation has been merged into a si
  */
  get namedChunkGroups() {
  return createReadonlyMap<ChunkGroup>({
- keys: (): IterableIterator<string> => {
+ keys: (): MapIterator<string> => {
  const names = this.#inner.getNamedChunkGroupKeys();
  return names[Symbol.iterator]();
  },
@@ -1190,6 +1190,21 @@ BREAKING CHANGE: Asset processing hooks in Compilation has been merged into a si
 
 export type EntryData = binding.JsEntryData;
 
+/**
+ * Describes an {@link Iterator} produced by the runtime that inherits from the intrinsic `Iterator.prototype`.
+ */
+interface IteratorObject<T, TReturn = unknown, TNext = unknown>
+ extends Iterator<T, TReturn, TNext> {
+ [Symbol.iterator](): IteratorObject<T, TReturn, TNext>;
+}
+
+type BuiltinIteratorReturn = any;
+
+interface MapIterator<T>
+ extends IteratorObject<T, BuiltinIteratorReturn, unknown> {
+ [Symbol.iterator](): MapIterator<T>;
+}
+
 export class Entries implements Map<string, EntryData> {
  #data: binding.JsEntries;
 
@@ -1218,7 +1233,7 @@ export class Entries implements Map<string, EntryData> {
  return this.#data.size;
  }
 
- entries(): IterableIterator<[string, binding.JsEntryData]> {
+ entries(): MapIterator<[string, binding.JsEntryData]> {
  const self = this;
  const keys = this.keys();
  return {
@@ -1235,11 +1250,11 @@ export class Entries implements Map<string, EntryData> {
  };
  }
 
- values(): IterableIterator<binding.JsEntryData> {
+ values(): MapIterator<binding.JsEntryData> {
  return this.#data.values()[Symbol.iterator]();
  }
 
- [Symbol.iterator](): IterableIterator<[string, binding.JsEntryData]> {
+ [Symbol.iterator](): MapIterator<[string, binding.JsEntryData]> {
  return this.entries();
  }
 
@@ -1264,7 +1279,7 @@ export class Entries implements Map<string, EntryData> {
  return this.#data.get(key);
  }
 
- keys(): IterableIterator<string> {
+ keys(): MapIterator<string> {
  return this.#data.keys()[Symbol.iterator]();
  }
 }