Move to `pyproject.toml` installation. #891

	name: Testing

	on:
	workflow_dispatch:
	branches:
	- develop
	pull_request:
	types: [opened, synchronize, ready_for_review]
	branches:
	- develop

	jobs:
	pytest:
	name: Pytest on ${{ matrix.os }}
	runs-on: ${{ matrix.os }}
	strategy:
	fail-fast: false
	matrix:
	os: [ubuntu-22.04, windows-latest, macos-latest]

	steps:
	- uses: actions/checkout@v4
	- uses: conda-incubator/setup-miniconda@v2
	with:
	miniconda-version: "latest"
	auto-update-conda: true
	auto-activate-base: false
	- name: Switch to gcc-10 on linux
	if: runner.os == 'Linux'
	run: \|
	sudo apt install gcc-10 g++-10 cpp-10
	sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-10 100 --slave /usr/bin/g++ g++ /usr/bin/g++-10 --slave /usr/bin/gcov gcov /usr/bin/gcov-10
	- name: Install dependencies
	run: \|
	conda env create --name ci-env --file environment.yml
	shell: bash -l {0}
	- name: Print debugging information
	run: \|
	conda activate ci-env
	conda list
	shell: bash -l {0}
	- name: Install catkit2
	run: \|
	conda activate ci-env
	pip install -v -e .
	shell: bash -l {0}
	- name: Run tests
	run: \|
	conda activate ci-env
	pytest
	shell: bash -l {0}

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