WP -> Theme -> Scripts

// Replace bundled WP version of jQuery with the latest one
function replace_core_jquery_version() {
	if (!is_admin()) {
		wp_deregister_script( 'jquery-core' );
		wp_register_script( 'jquery-core', "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js", array(), '3.2.1' );
		wp_deregister_script( 'jquery-migrate' );
		wp_register_script( 'jquery-migrate', "https://cdnjs.cloudflare.com/ajax/libs/jquery-migrate/3.0.1/jquery-migrate.min.js", array(), '3.0.1' );
	}
}
add_action('init', 'replace_core_jquery_version' );

// Dequeue jQuery Migrate script in WordPress
add_action( 'wp_default_scripts', function( $scripts ){
	if (!empty($scripts->registered['jquery'])) $scripts->registered['jquery']->deps = array_diff( $scripts->registered['jquery']->deps, array( 'jquery-migrate'));
});