chore: replace use of deprecated variadic listen()

Author: Fdawgs

README.md

@@ -35,7 +35,7 @@ server.register(require('@fastify/http-proxy'), {
   http2: false // optional
 })
 
-server.listen(3000)
+server.listen({ port: 3000 })
 ```
 
 This will proxy any request starting with `/api` to `http://my-api.example.com`. For instance `http://localhost:3000/api/users` will be proxied to `http://my-api.example.com/users`.
@@ -69,7 +69,7 @@ server.register(proxy, {
   http2: false // optional
 })
 
-server.listen(3000)
+server.listen({ port: 3000 })
 ```
 
 Notice that in this case it is important to use the `prefix` option to tell the proxy how to properly route the requests across different upstreams.
@@ -98,7 +98,7 @@ server.register(proxy, {
 })
 
 
-server.listen(3000);
+server.listen({ port: 3000 });
 ```
 
 ## Options

benchmarks/fast-proxy.js

@@ -19,7 +19,7 @@ async function startProxy (base) {
     proxy(request.raw, reply.raw, request.url, {})
   })
 
-  await server.listen(3000)
+  await server.listen({ port: 3000 })
   return server
 }
 

benchmarks/fastify-proxy.js

@@ -20,7 +20,7 @@ async function startProxy (upstream) {
     undici
   })
 
-  await server.listen(3000)
+  await server.listen({ port: 3000 })
   return server
 }
 

benchmarks/origin.js

@@ -21,7 +21,7 @@ async function startOrigin () {
     throw new Error('kaboom')
   })
 
-  await origin.listen(3001)
+  await origin.listen({ port: 3001 })
 
   return origin
 }

examples/example.js

@@ -25,7 +25,7 @@ async function startOrigin () {
     throw new Error('kaboom')
   })
 
-  await origin.listen(0)
+  await origin.listen()
 
   return origin
 }
@@ -37,7 +37,7 @@ async function startProxy (upstream) {
     prefix: '/upstream' // optional
   })
 
-  await server.listen(3000)
+  await server.listen({ port: 3000 })
   return server
 }