Adjust copyrights years

<?php
/**
 * SeekQuarry/Yioop --
 * Open Source Pure PHP Search Engine, Crawler, and Indexer
 *
 * Copyright (C) 2009 - 2020  Chris Pollett chris@pollett.org
 *
 * LICENSE:
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 * END LICENSE
 *
 * @author Chris Pollett chris@pollett.org
 * @license https://www.gnu.org/licenses/ GPL3
 * @link https://www.seekquarry.com/
 * @copyright 2009 - 2020
 * @filesource
 */
namespace seekquarry\yioop\views;

/**
 * This view is drawn when someone clicks
 * on the cached link of a web-page for which
 * no cache is available
 *
 * @author Chris Pollett
 */
class NocacheView extends View
{
    /** This view is drawn on a web layout
     * @var string
     */
    public $layout = "web";
    /**
     * Draws a simple message saying no cache available of
     * the requested page
     *
     * @param array $data   at this point this view does not make
     * use of the $data info passed to it.
     */
    public function renderView($data) {
        if (!empty($data['MEDIA_NAME'])) {
            ?>
            <h1 class="center"><?= tl('nocache_view_media_not_found') ?></h1>
            <p class="center"><?= $data['MEDIA_NAME'] ?></p>
            <?php
        } else {
            ?>
            <h1><?= tl('nocache_view_no_cache') ?></h1>
            <p>
            <a href="<?= $data['URL'] ?>"><?= $data['URL'] ?></a>.<br />
            </p>
            <?php
        }
        if (isset($data["SUMMARY_STRING"])) {?>
           <p><?= tl('nocache_view_summary_contents') ?></p>
           <pre>
           <?= $data["SUMMARY_STRING"] ?>
           </pre>
        <?php
        }
    }
}