webpack-env require.ensure typing update (#24951)

* webpack-env require.ensure typing update

* webpack-env require.ensure typing fix

types/webpack-env/index.d.ts

@@ -31,7 +31,7 @@ declare namespace __WebpackModuleApi {
          *
          * This creates a chunk. The chunk can be named. If a chunk with this name already exists, the dependencies are merged into that chunk and that chunk is used.
          */
-        ensure(paths: string[], callback: (require: NodeRequire) => void, chunkName?: string): void;
+        ensure(paths: string[], callback: (require: NodeRequire) => void, errorCallback?: (error: any) => void, chunkName?: string): void;
         context(path: string, deep?: boolean, filter?: RegExp): RequireContext;
         /**
          * Returns the module id of a dependency. The call is sync. No request to the server is fired. The compiler ensures that the dependency is available.