v4.19.0

Features

• New Attribute: Parameter.short_alias to automatically generate short aliases for parameters. by @mgielda in #831
• Add ArgumentCollection.filter_by(missing=...) for required/conditionally-required fields. by @BrianPugh in #840

New Contributors

• @mgielda made their first contribution in #831

Full Changelog: v4.18.0...v4.19.0