Updated to Drupal 8.6.4, which is PHP 7.3 friendly. Also updated HTMLaw library....

[yaffs-website] / node_modules / graceful-readlink / index.js

var fs = require('fs')
  , lstat = fs.lstatSync;

exports.readlinkSync = function (p) {
  if (lstat(p).isSymbolicLink()) {
    return fs.readlinkSync(p);
  } else {
    return p;
  }
};