feat: create Future class

Author: Art4

src/Redmine/Future.php

@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Redmine;
+
+/**
+ * @internal
+ */
+final class Future
+{
+    public static function isForwardCompatibilityEnabled(): bool
+    {
+        return false;
+    }
+}

tests/Unit/FutureTest.php

@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Redmine\Tests\Unit;
+
+use PHPUnit\Framework\TestCase;
+use Redmine\Future;
+
+final class FutureTest extends TestCase
+{
+    public function testIsForwardCompatabilityEnabledReturnsFalseByDefault(): void
+    {
+        self::assertFalse(Future::isForwardCompatibilityEnabled());
+    }
+}