Cadquery

Final 7.4 release

Solves the issue of pass by ref smart pointers.

This is the next release in our January-June release schedule.

The [changelog](https://github.com/CadQuery/cadquery/blob/2.4.0/changes.md) includes Highlights at the top with all other changes down below that. Please read those to get a good overview of what has changed and been added.

Thank you to the community for their contributions to help make CadQuery what it is, and to our core developers for the time and energy they spend on CadQuery.

Incremental release to fix broken PyPI package.

The [changelog](https://github.com/CadQuery/cadquery/blob/2.3.1/changes.md) includes Highlights, Breaking Changes, and Experimental Features at the top. Please read those to get a good overview of what has changed and been added.

Thank you to the community for their contributions to help make CadQuery what it is, and to our core developers for the time and energy they spend on CadQuery.