node.js fetch is wrongly typed bpasero#1 (#4272)

Author: bpasero

test/types/fetch.test-d.ts

@@ -174,6 +174,7 @@ expectType<boolean>(response.bodyUsed)
 expectType<Promise<ArrayBuffer>>(response.arrayBuffer())
 expectType<Promise<Blob>>(response.blob())
 expectType<Promise<FormData>>(response.formData())
+expectType<Promise<Uint8Array>>(response.bytes())
 expectType<Promise<unknown>>(response.json())
 expectType<Promise<string>>(response.text())
 expectType<Response>(response.clone())

types/fetch.d.ts

@@ -33,6 +33,7 @@ export class BodyMixin {
 
   readonly arrayBuffer: () => Promise<ArrayBuffer>
   readonly blob: () => Promise<Blob>
+  readonly bytes: () => Promise<Uint8Array>
   /**
    * @deprecated This method is not recommended for parsing multipart/form-data bodies in server environments.
    * It is recommended to use a library such as [@fastify/busboy](https://www.npmjs.com/package/@fastify/busboy) as follows: