Update the version number on child theme stylesheet that's been enqueued from Parent theme

functions.php

<?php
/**
 * If you have a child theme that has had its stylesheet enqueued from within the main Parent theme,
 * and you wish to update the version number that’s appended to the url, you can include this in your
 * child theme functions.php file.
 *
 * Obviously, change the version number (‘6.0.0’ in this example) to whatever is appropriate for you,
 * along with comparing the approriate stylesheet handle ('ephemeris-style' in this example)
 *
 * Where:
 * $src – (string) The source URL of the enqueued style
 * $handle – (string) The style's registered handle
 *
 */
function mytheme_update_stylesheet_version( $src, $handle ) {
    if( !strcmp( $handle, 'ephemeris-style' ) ) {
        $src = get_stylesheet_uri();
        $src = add_query_arg( 'ver', '6.0.0', $src );
    }
    return $src;
}
add_filter( 'style_loader_src', 'mytheme_update_stylesheet_version', 10, 2 );