zli v4.1.0

Completely reworked the spinner, with a simplified api:

• spinner.start
• spinner.updateMessage
• spinner.succeed, fail, info
• recommendation to use spinner.print instead of your own writer.print to not have non-displayed messages as spinner works on its own thread.

full changelog: https://github.com/xcaeser/zli/compare/v4.0.3...v4.1.0