New exception page compatibility

[soullivaneuh]

Symfony 3.3 will come with a new Exception page design: http://symfony.com/blog/new-in-symfony-3-3-redesigned-exception-pages

Compatibility should be checked and fixed if necessary.

[pyrech]

Thank you for worrying about the compatibilty ☺ I released a version (1.3) some days ago that just fix that 😇 Have fun!