v1.0.16

What's Changed

• Fix CI failures from linter updates by @brentyi in #488
• Use nested type docstrings as default helptext for argument groups by @brentyi in #485
• Render constructor ValueErrors as CLI errors for root types by @brentyi in #486
• Improve usage statement conventions for positional arguments by @brentyi in #487

Full Changelog: v1.0.15...v1.0.16