Console 3.1.0

New:

• Created CustomActivity activity indicator type. this lets you easily create custom activity indicators with a series of characters that are looped over for the animation.
• Added a customActivity method to the Console protocol, which initializes a new CustomActivity instance.

let indicator = context.console.customActivity(frames: ["⠋","⠙","⠹","⠸","⠼","⠴","⠦","⠧","⠇","⠏"])
_ = try indicator.start(on: context.container)
// Do something that takes a long time.
indicator.succeed()