Add localization for listener activities

[denydias]

Laravel Activity Logger already provide almost complete localization support. There's only one area where localization couldn't happen: event listener activities ('logged in', 'logged out' and such). This PR is an attempt to provide this missing functionality to such a great package.

[denydias]

Scrutinizer failed, but I don't think it's related to the proposed PR:

PHP Fatal error:  Array and string offset access syntax with curly braces is no longer supported in /home/scrutinizer/.analysis/phpcs/vendor/squizlabs/php_codesniffer/src/Config.php on line 399
PHP Stack trace:
PHP   1. {main}() /home/scrutinizer/.analysis/phpcs/vendor/squizlabs/php_codesniffer/bin/phpcs:0
PHP   2. PHP_CodeSniffer\Runner->runPHPCS() /home/scrutinizer/.analysis/phpcs/vendor/squizlabs/php_codesniffer/bin/phpcs:18
PHP   3. PHP_CodeSniffer\Autoload::load($class = 'PHP_CodeSniffer\\Config') /home/scrutinizer/.analysis/phpcs/vendor/squizlabs/php_codesniffer/src/Runner.php:67
PHP   4. PHP_CodeSniffer\Autoload::loadFile($path = '/home/scrutinizer/.analysis/phpcs/vendor/squizlabs/php_codesniffer/src/Config.php') /home/scrutinizer/.analysis/phpcs/vendor/squizlabs/php_codesniffer/autoload.php:134

[jeremykenedy]

Thank you

[denydias]

My pleasure