WordPress | Enqueue scripts/styles automaticly using right version number from parent-/child-theme

enqueue-styles-with-right-version.php

<?php
/*
 * Enqueue parent and child theme style.css
 */
add_action( 'wp_enqueue_scripts', 'my_theme_enqueue_styles', 20 );
function my_theme_enqueue_styles() {

	// Get the theme data
	$my_theme = wp_get_theme();

	// Add parent theme styles
	wp_enqueue_style( 'parent-theme', get_template_directory_uri() . '/style.css', array(), $my_theme->parent()->get( 'Version' ) );
	// Add child theme styles
	wp_enqueue_style( 'child-theme', get_stylesheet_directory_uri() . '/style.css', array( 'parent-theme', ), $my_theme->get( 'Version' ) );

}