v3.7.1

This release adds an optional r_in argument to the rectangular hollow section function in the steel sections library.

What's Changed

🚀 Features

• Add inner radius argument to rectangular_hollow_section() (#493) @robbievanleeuwen

📦 Dependencies

• Bump version to v3.7.1 (#494) @robbievanleeuwen

Full changelog: v3.7.0...v3.7.1