upgrade to laravel 7 and set branch to v2

vendor/cakephp/chronos/src/DifferenceFormatterInterface.php

@@ -0,0 +1,35 @@
+<?php
+declare(strict_types=1);
+
+/**
+ * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
+ *
+ * Licensed under The MIT License
+ * Redistributions of files must retain the above copyright notice.
+ *
+ * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
+ * @link          http://cakephp.org CakePHP(tm) Project
+ * @license       http://www.opensource.org/licenses/mit-license.php MIT License
+ */
+namespace Cake\Chronos;
+
+/**
+ * Interface for formatting differences in text.
+ */
+interface DifferenceFormatterInterface
+{
+    /**
+     * Get the difference in a human readable format.
+     *
+     * @param \Cake\Chronos\ChronosInterface $date The datetime to start with.
+     * @param \Cake\Chronos\ChronosInterface|null $other The datetime to compare against.
+     * @param bool $absolute Removes time difference modifiers ago, after, etc.
+     * @return string The difference between the two days in a human readable format.
+     * @see \Cake\Chronos\ChronosInterface::diffForHumans
+     */
+    public function diffForHumans(
+        ChronosInterface $date,
+        ?ChronosInterface $other = null,
+        bool $absolute = false
+    ): string;
+}