Add Pyodide (wasm) compatible build

[isaacbrodsky]

I think this needs to be added in https://github.com/pyodide/pyodide, but it would be very useful for Pyodide based applications

[ajfriend]

https://pyodide.org/en/stable/development/new-packages.html

[agriyakhetarpal]

Thanks for contributing to Pyodide! To ensure that h3 works well, I would recommend an out-of-tree build, so that you can run the test suite on every commit/PR: https://pyodide.org/en/stable/development/building-and-testing-packages.html