Regression in 1.31.2, server doesn't shutdown gracefully

[Antonio476587]

When I run this code with the --watch flag and trigger a change, it throws an error.

import { serve } from "https://deno.land/std@0.114.0/http/server.ts";

serve((_req) => new Response("Hello, world"));

Error:

Watcher File change detected! Restarting!
✅ Granted net access to "0.0.0.0:8000".
error: Uncaught AddrInUse: Address already in use (os error 98)
    const listener = Deno.listen({
                          ^
    at Object.listen (ext:deno_net/01_net.js:356:39)
    at Server.listenAndServe (https://deno.land/std@0.114.0/http/server.ts:232:27)
    at serve (https://deno.land/std@0.114.0/http/server.ts:614:23)
    at file:///home/seo/Documents/Programming/portfolio-new/loopTester.ts:4:1
Watcher Process finished. Restarting on file change...

[GJZwiers]

Related: #16699 (comment)

[GJZwiers]

Did a bisect, looks like 0cce9c2 re-introduced the error.

[dsherret]

Seems it should be reverted. cc @littledivy @bartlomieju