import { ConversationForm } from "https://deno.land/x/grammy_conversations@v1.1.1/form.ts";
Waits until the user sends a number, and returns this number. If the user
sends something that cannot be parsed to a number using parseFloat
,
these updates will be skipped. You may specify the otherwise
handler
that is called in such cases. Among other things, this allows you to tell
the user that they need to send some text.