Broken installation from pip on Mac M1 (with miniconda)

Hello,

I am sorry I'm quite new on GitHub, feel free to correct me or my issue if something's wrong.

I just wanted to highlight that when installing lightfm with `pip install lightfm` on Apple Silicon using an arm64-miniconda environment, the installation fails with the error:

> clang: error: the clang compiler does not support '-march=native'.

I see that in **setup.py** there is an apposite check for Anaconda
```
if "anaconda" not in sys.version.lower():
compile_args.append("-march=native")
```
but it looks like it's not working for miniconda or something.

So I just cloned the repo, switched that compile argument to `-mcpu=apple-m1` and then installation went smoothly.

Hope you can fix it for future noobs like me :)

Start in setup.py, where the issue identifies the Anaconda check and the -march=native compiler argument. Reproduce pip install lightfm in an arm64-miniconda environment and verify that installation completes without the clang error for Apple Silicon users.

Written by the indexing model from the issue text.