import { Interface } from "https://dotland.deno.dev/std@0.177.0/node/readline.ts";
The rl.close() method closes the readline.Interface instance and
relinquishes control over the input and output streams. When called,
the 'close' event will be emitted.
Calling rl.close() does not immediately stop other events (including 'line')
from being emitted by the readline.Interface instance.