Breaks PHP Strict Standards (PHP 5.5)

On activation:

PHP Strict standards:  Declaration of lctwidget_Taxonomy_Dropdown_Walker::start_el() should be compatible with Walker::start_el(&$output, $object, $depth = 0, $args = Array, $current_object_id = 0) in /Users/robrecord/Sites/wp2/content/plugins/list-custom-taxonomy-widget/list-custom-taxonomy-widget.php on line 0
PHP Stack trace:
PHP   1. {main}() /usr/local/Cellar/wp-cli/0.17.0/php/boot-fs.php:0
PHP   2. include() /usr/local/Cellar/wp-cli/0.17.0/php/boot-fs.php:17
PHP   3. WP_CLI\Runner->after_wp_load() /usr/local/Cellar/wp-cli/0.17.0/php/wp-cli.php:34
PHP   4. WP_CLI\Runner->_run_command() /usr/local/Cellar/wp-cli/0.17.0/php/WP_CLI/Runner.php:696
PHP   5. WP_CLI\Runner->run_command() /usr/local/Cellar/wp-cli/0.17.0/php/WP_CLI/Runner.php:311
PHP   6. WP_CLI\Dispatcher\Subcommand->invoke() /usr/local/Cellar/wp-cli/0.17.0/php/WP_CLI/Runner.php:304
PHP   7. call_user_func:{/usr/local/Cellar/wp-cli/0.17.0/php/WP_CLI/Dispatcher/Subcommand.php:293}() /usr/local/Cellar/wp-cli/0.17.0/php/WP_CLI/Dispatcher/Subcommand.php:293
PHP   8. WP_CLI\Dispatcher\CommandFactory::WP_CLI\Dispatcher\{closure}() /usr/local/Cellar/wp-cli/0.17.0/php/WP_CLI/Dispatcher/Subcommand.php:293
PHP   9. call_user_func:{/usr/local/Cellar/wp-cli/0.17.0/php/WP_CLI/Dispatcher/CommandFactory.php:52}() /usr/local/Cellar/wp-cli/0.17.0/php/WP_CLI/Dispatcher/CommandFactory.php:52
PHP  10. Plugin_Command->activate() /usr/local/Cellar/wp-cli/0.17.0/php/WP_CLI/Dispatcher/CommandFactory.php:52
PHP  11. activate_plugin() /usr/local/Cellar/wp-cli/0.17.0/php/commands/plugin.php:155

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