`fs.realpath.native` is broken by wrapping

[trentm]

Hi. In https://github.com/elastic/apm-agent-nodejs we have a fork of this lib (https://github.com/elastic/apm-agent-nodejs/blob/master/lib/instrumentation/patch-async.js). Recently we did a fix for an issue where the wrapping of fs.realpath accidentally wipes out fs.realpath.native. Our patch for that is this: https://github.com/elastic/apm-agent-nodejs/pull/2403/files#diff-68468fdd0c330b902912d266a6d7520b11b168fd1b1c07acc5d85361237a79d5

If someone using this lib runs into this, then hopefully this helps. If this lib is being maintained, poke me and I can look into making a PR with this patch.

[s100]

Our workaround for this issue is as follows:

const fs = require('fs')
const fs$realpath$native = fs.realpath.native
require('async-listener')
fs.realpath.native = fs$realpath$native