import { appendFile } from "https://deno.land/std@0.103.0/node/_fs/_fs_appendFile.ts";
TODO: Also accept 'data' parameter as a Node polyfill Buffer type once these are implemented. See https://github.com/denoland/deno/issues/3403
Parameters
pathOrRid: string | number | URL
optionsOrCallback: Encodings | WriteFileOptions | CallbackWithError
optional
callback: CallbackWithError