Deprecation:
there is a better way to do it - `InputInterface::isInteractive()` method.
Sadly, this doesn't work properly prior Symfony\Console 2.7 and as we need
to support 2.5+ until the next major, we are forced to do a more explicit
check for the CLI option. This should be reverted back to proper a
`InputInterface::isInteractive()` call as soon as we bump dependencies
to Symfony\Console 3.x in Behat 4.x.