added support for PHP 8.0 types mixed, static, false, null

Author: dg

src/PhpGenerator/PhpNamespace.php

@@ -28,7 +28,8 @@ final class PhpNamespace
 
 	private const KEYWORDS = [
 		'string' => 1, 'int' => 1, 'float' => 1, 'bool' => 1, 'array' => 1, 'object' => 1,
-		'callable' => 1, 'iterable' => 1, 'void' => 1, 'self' => 1, 'parent' => 1,
+		'callable' => 1, 'iterable' => 1, 'void' => 1, 'self' => 1, 'parent' => 1, 'static' => 1,
+		'mixed' => 1, 'null' => 1, 'false' => 1,
 	];
 
 	/** @var string */

src/PhpGenerator/Type.php

@@ -25,9 +25,12 @@ class Type
 		CALLABLE = 'callable',
 		ITERABLE = 'iterable',
 		VOID = 'void',
+		MIXED = 'mixed',
+		FALSE = 'false',
 		NULL = 'null',
 		SELF = 'self',
-		PARENT = 'parent';
+		PARENT = 'parent',
+		STATIC = 'static';
 
 
 	public static function nullable(string $type, bool $state = true): string