Remove Symfony versions < 2.8 from travis.yml

[chalasr]

After discussed in #132, we stop supporting Symfony versions lower than 2.8 for the branch 2.0 and 2.x releases of this bundle, and so stop ensuring compatibility with these Symfony versions on travis-ci .

Open to any suggestion (missing version, specific php version for specific symfony one, ...).

[slashfan]

We should remove PHP5.4 reference and also test against PHP 5.5, I know it's dead but this is Symfony 3.0 and current namshi/jose minimal PHP version requirement.

[chalasr]

Don't you think that we should ensure compatibility with (almost) the minimal PHP version required by Symfony 2,8? It requires 5.3.9 so 5.4 could be a good compromise, plus the 5.4 release given lots of new features.

Otherwise no problem, I'll remove it.

[slashfan]

OK, we can keep PHP 5.4 compatibility since we do not directly use specific PHP 5.5+ features at the moment (athough namshi/jose library currently requires 5.5+ so there might be a conflict during a composer install). But PHP 5.3 is way too old to be taken care of anymore.

[chalasr]

@slashfan Did I miss something or is it ok for this one?

[slashfan]

@chalasr OK for me

[chalasr]

@slashfan You were right, 5.5 introduced interesting features such as ClassName::class to get a FQCN.
I'll remove 5.4 form travis config and make the bundle requiring php 5.5.
Is it ok for you?

[slashfan]

👍 for me