update build instructions in README #33

	name: build-macos

	on:
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]

	env:
	# Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
	BUILD_TYPE: Release

	jobs:
	mamba-build:
	strategy:
	matrix:
	version: [ "3.8", "3.9", "3.10", "3.11", "3.12" ]
	os: [ macos-11, macos-12, macos-13 ]
	runs-on: ${{ matrix.os }}
	steps:
	- uses: actions/checkout@v3

	- name: Install Conda environment from environment.yml
	uses: mamba-org/setup-micromamba@v1
	with:
	environment-file: environment.yml
	create-args: >-
	python=${{ matrix.version }}
	cache-environment: true

	- name: Run the build script
	shell: bash -l {0}
	run: \|
	export CC=clang
	export CXX=clang++
	bash script/dependencies.sh # install dependencies
	python setup.py bdist_wheel -- --preset build-osx # build the wheel

	- name: 'Build wheel'
	uses: actions/upload-artifact@v3
	with:
	name: pyoperon-wheel
	path: dist/*.whl
	retention-days: 90

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