Minitest fix

[Ortuna]

Minitest upgraded to 5, but unfortunately has breaking changes here

Should keep major version to 4? Don't use minitest much but I think version 4 should be reasonable ?

[nesquena]

Wow that is a really breaking change. Locking to ~> 4 for now it is. Thanks!

[dariocravero]

Thanks @Ortuna!! @nesquena I reckon we can look at replacing that? Looks like we're only using it in one place:

@daris.local➜  padrino-framework git:(master) grep "MiniTest::Unit.output" **/*.rb
padrino-core/test/mini_shoulda.rb:MiniTest::Unit.output = ColoredIO.new(MiniTest::Unit.output)

I might be wrong but I think we should be using minitest/pride for that.

Thoughts?

[achiurizo]

@Ortuna @nesquena @dariocravero 4 is fine for now, but we should move to 5 ASAP. This also likely means the minitest generators need to be updated for minitest 5.

[nesquena]

minitest is currently locked at ~> 2.6 in our generators so those are OK until we want to move them to 5 also.