fix: Add TypeScript definitions for Response.redirect() and Response.json() (#512)

Author: harmony7

types/globals.d.ts

@@ -1111,7 +1111,8 @@ declare var Response: {
   prototype: Response;
   new(body?: BodyInit | null, init?: ResponseInit): Response;
   // error(): Response;
-  // redirect(url: string | URL, status?: number): Response;
+  redirect(url: string | URL, status?: number): Response;
+  json(data: any, init?: ResponseInit): Response;
 };
 
 /**