2.2.0 (February 06, 2021)

• Convert GitHub CI from Travis CI to Github Actions
• Fix min-required after it was broken by 2.1.0 (#235)
• Min-required recursive lookup was dangerously broken. Removed the recursion that should never have been (#237)
• Fix the failure of tfenv list when no default was set (#236)
• Add init command (#240)
• Use ggrep on Mac with Homebrew (#218)