title: I installed guzzlehttp/guzzle 6.0 and now laravel passport is not working
body: <p>I installed guzzlehttp/guzzle with composer, composer require guzzlehttp/guzzle ~6.0, after that, all the application is running ok, but laravel passport is not working, it said the next error</p>
  <blockquote>
  <p>ParseError: syntax error, unexpected 'Parser' (T_STRING), expecting function (T_FUNCTION) or const (T_CONST) in file back/vendor/lcobucci/jwt/src/Configuration.php on line 22,</p>
  </blockquote>
  <p>Any suggestion? thank you</p>