Nodejs lightweight, beautiful and user-friendly interactive prompts

 prompts permits one to easy use cli prompts to enquire users for information:
  * User friendly: prompt uses layout and colors to create beautiful cli
                   interfaces.
  * Promised: uses promises and `async`/`await`. No callback hell.
  * Flexible: all prompts are independent and can be used on their own.
  * Testable: provides a way to submit answers programmatically.
  * Unified: consistent experience across all [prompts](#-types).