fix: remove PHP 8 typing

Signed-off-by: Bart Jaskulski <bjaskulski@protonmail.com>

src/di-functions.php

@@ -59,7 +59,7 @@ if ( ! function_exists( 'WPDesk\Init\DI\factory' ) ) {
 	 * @param callable|array|string $factory The factory is a callable that takes the container as parameter
 	 *        and returns the value to register in the container.
 	 */
-	function factory( callable|array|string $factory ): FactoryDefinitionHelper {
+	function factory( $factory ): FactoryDefinitionHelper {
 		return new FactoryDefinitionHelper( $factory );
 	}
 }
@@ -77,7 +77,7 @@ if ( ! function_exists( 'WPDesk\Init\DI\decorate' ) ) {
 	 * @param callable $callable The callable takes the decorated object as first parameter and
 	 *                           the container as second.
 	 */
-	function decorate( callable|array|string $callable ): FactoryDefinitionHelper {
+	function decorate( $callable ): FactoryDefinitionHelper {
 		return new FactoryDefinitionHelper( $callable, true );
 	}
 }