Updated typings for "restify-cookies". (#20548)

* Added typings for "require-dir".

* Fixed dtslint errors.

* Fixed By field.

* Added typings for "restify-cookies".

* Added "cookies" field to Request interface.

types/restify-cookies/index.d.ts

@@ -16,6 +16,10 @@ declare module 'restify' {
     secure?: boolean;
   }
 
+  interface Request {
+    cookies: any;
+  }
+
   interface Response {
     setCookie(key: string, val: string, options?: CookieOptions): void;
   }

types/restify-cookies/restify-cookies-tests.ts

@@ -3,6 +3,6 @@ import 'restify-cookies';
 
 function test(server: Server) {
   server.get('/api/test', (req: Request, res: Response) => {
-    res.setCookie('myCookie', 'test', { path: '/' });
+    res.setCookie('myCookie', 'test' + req.cookies.foo, { path: '/' });
   });
 }