Fix: force the use of colors when the '--colors' flag is supplied.

[esthezia]

When the php-parallel-lint command is ran as a subcommand, and the --colors flag is used, it is not honoured. This fixes this, and allows for coloured output when forced.

[jrfnl]

@esthezia Thank you for your interest in contributing to this repo.

Would you mind adding a test covering the change to this PR ?

[esthezia]

Unfortunately, I'm not able to do that. Can you, please, help me with this piece?

Thank you!

[jrfnl]

Unfortunately, I'm not able to do that. Can you, please, help me with this piece?

@esthezia What information do you need to allow you to add the test(s) ?

[esthezia]

@jrfnl The codebase is very new to me, and it is not within the scope of my intetest to get to know it, unfortunately. I discovered how to fix this bug because it was easy, and did not have to dig through the code so much. But other than that, I am not interested in doing, and can't, at the moment. But I would hate to not have this fixed for a missing test -- if you, or someone else, can help with the test, it would be very helpful, as we can get this working for a lot of people!

Thank you! Respectfully.