Conda-Forge package is marked x86 only

[MatthiasJ1]

This prevents installation on M1 or other ARM systems. Since this does not provide any compiled binaries, it can be marked noarch to signify it is CPU-architecture independent.

[evhub]

Looks like this doesn't work with selectors for some reason, so not sure how to implement this: conda-forge/coconut-feedstock#36

I probably won't try to fix this, since pip is recommended over conda anyway, but you're welcome to put together a PR for coconut-feedstock if you can figure out how to make it work.