Switch to using pdm #124

	name: eurec4a_environment

	on:
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	jobs:
	build:

	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: [3.6, 3.7, 3.8]

	steps:
	- uses: actions/checkout@v2
	- name: Install udunits2
	run: sudo apt-get install libudunits2-dev
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v1
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies (pip)
	run: \|
	python -m pip install --upgrade pip
	pip install -r requirements.txt
	- name: Lint with flake8
	run: \|
	pip install flake8
	# stop the build if there are Python syntax errors or undefined names
	flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
	# exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
	flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
	# tmake may be used to debug CI run
	# - name: Setup tmate session
	# uses: mxschmitt/action-tmate@v2
	- name: Test with pytest
	run: \|
	pip install pytest
	python -m pytest --ignore=src/

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