message: Update the copyright year on the about tab
diff: @@ -56,7 +56,7 @@ export class AboutTab extends ViewerElement {
  const divContainer = document.createElement('div');
  divContainer.innerHTML = `<div id='${ID_ABOUT}'>
  <h1>Extraterm</h1>
  - <p>Copyright &copy; 2015-2017 Simon Edwards &lt;simon@simonzone.com&gt;</p>
  + <p>Copyright &copy; 2015-2018 Simon Edwards &lt;simon@simonzone.com&gt;</p>
  <p>Published under the MIT license</p>
  <p>See <a href="http://extraterm.org">extraterm.org</a> and <a href="https://github.com/sedwards2009/extraterm">https://github.com/sedwards2009/extraterm</a></p>
  <hr>
  