Updated symfony/console required version to be less restrictive

[acelaya]

I have tested that all commands keep working with symfony/console 2.8, 3.0 and 3.1, as well as 3.2, so I have changed the required version to ^3.0 || ^2.8.

I think this is important, since symfony/console is a widely used component, and being too restrictive could cause version conflicts.

Also, symfony 3.3 is going to be released soon, and requiring ^3.2.7 will conflict with users that want to use it.

I haven't added tests because of the way travis is configured. As far as I see, tests are already being run against different dependency versions and passing.

[geerteltink]

Also, symfony 3.3 is going to be released soon, and requiring ^3.2.7 will conflict with users that want to use it.

I think you are confusing ^3.2.7 with ~3.2.7.

caret: ^3.2.7 is equivalent to >=3.2.7 <4.0.0
tilde: ~3.2.7 is equivalent to >=3.2.7 <3.3.0

[acelaya]

Right, my mistake.
Anyway, I don't see any reason to not support earlier compatible versions

[geerteltink]

Thanx @acelaya