import { tryCatch } from "https://deno.land/x/rambda@9.4.1/immutable.d.ts";
It returns function that runs fn in try/catch block. If there was an error, then fallback is used to return the result. Note that fn can be value or asynchronous/synchronous function(unlike Ramda where fallback can only be a synchronous function).
Parameters
fallback: T