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

[yaffs-website] / node_modules / underscore.string / decapitalize.js

var makeString = require('./helper/makeString');

module.exports = function decapitalize(str) {
  str = makeString(str);
  return str.charAt(0).toLowerCase() + str.slice(1);
};