wit-bindgen-csharp-0.13.2 has been yanked.
// generate the c# and the component meta module
cargo run c-sharp --string-encoding utf8 --out-dir testing-csharp tests/codegen/floats.wit
// generate the c# and the component meta module
cargo run c-sharp --string-encoding utf8 --out-dir testing-csharp tests/codegen/floats.wit