• Added the Headers class from the Fetch standard.
• Added the element.translate getter and setter.
• Fixed synchronous XMLHttpRequest on the newly-released Node.js v12.
• Fixed form.elements to exclude <input type="image"> elements.
• Fixed event path iteration in shadow DOM cases, following spec fixes at whatwg/dom#686 and whatwg/dom#750.
• Fixed pattern="" form control validation to apply the given regular expression to the whole string. (kontomondo)