Replace WordPress' jQuery with CDN jQuery of the right version

cdn-jquery.php

add_action( 'init', function(){
	if (  ! is_admin()) {
		if( is_ssl() ){
			$protocol = 'https';
		}else {
			$protocol = 'http';
		}

		/** @var WP_Scripts $wp_scripts */
		global  $wp_scripts;
		/** @var _WP_Dependency $core */
		$core = $wp_scripts->registered[ 'jquery-core' ];
		$core_version = $core->ver;
		$core->src = "$protocol://ajax.googleapis.com/ajax/libs/jquery/$core_version/jquery.min.js";

		if ( WP_DEBUG ) {
			/** @var _WP_Dependency $migrate */
			$migrate         = $wp_scripts->registered[ 'jquery-migrate' ];
			$migrate_version = $migrate->ver;
			$migrate->src    = "$protocol://cdn.jsdelivr.net/jquery.migrate/$migrate_version/jquery-migrate.min.js";
		}else{
			/** @var _WP_Dependency $jquery */
			$jquery = $wp_scripts->registered[ 'jquery' ];
			$jquery->deps = [ 'jquery-core' ];
		}

    }


},11 );