function Deno.listenTls
          
listenTls(options: ListenTlsOptions & TlsCertifiedKeyPem): TlsListener 
      Listen announces on the local transport address over TLS (transport layer security).
using listener = Deno.listenTls({
  port: 443,
  cert: Deno.readTextFileSync("./server.crt"),
  key: Deno.readTextFileSync("./server.key"),
});
Requires allow-net permission.
options: ListenTlsOptions & TlsCertifiedKeyPem