Ability to turn off warning when no pseudo terminal is found

[thisismydesign]

Hi,

I've noticed that the following message is printed when using the pty: true option on Windows: Requested PTY device but the system doesn't support it. This makes sense and the graceful fallback mentioned in the readme happens.

However the message is

• printed even if TTY::Command is used with no output
• printed as a plain line and is therefore out of place if TTY::Command is used with pretty or custom output
• sometimes simply expected and unwanted

Therefore it'd be great to have an option to turn off this message.

[piotrmurach]

Agree. I would suggest verbose option which is turned on by default? The warning could be expanded to advise a user that they need to disable this flag in order for the message to go. Can you cook up a PR?

[thisismydesign]

Thanks! Don't hold your breath but I'll cook up something soon-ish. :)

[thisismydesign]

Thanks :)