Force CSS changes to go live in a child theme in Wordpress

ForceCSSUpdates.php

<?php
// Enqueue child theme styles (typically in functions.php)
function update_child_theme_styles() {
    // Force CSS changes to go live
    wp_enqueue_style( '--child-theme-name--', 
        get_stylesheet_directory_uri() . '/style.css', 
        array(), 
        filemtime( get_stylesheet_directory() . '/style.css' ));
}

add_action( 'wp_enqueue_scripts', 'update_child_theme_styles', 1000 );