Follow up after nox PR

[henryiii]

• [x] Docs generation needs testing (I think it's broken) #34
• [x] Trampolim should be made statically versioned until FFY00/trampolim#4 is fixed.
• [ ] We probably should add test skips for PyPy on macOS and Windows CIBW
• [x] Tempting to bump to CIBW 2.0.0b2!
• [x] Add spellcheck #34