Update versioneer script to new Python #146

	name: Tests

	on:
	push:
	branches:
	- '*'
	pull_request:
	branches:
	- '*'
	workflow_dispatch: # allows you to trigger manually

	jobs:
	build:
	name: python-${{ matrix.python }}-${{ matrix.mpi }}
	runs-on: ubuntu-latest
	defaults:
	run:
	shell: bash -l {0}
	strategy:
	fail-fast: false
	matrix:
	python: ['3.7', '3.8']
	mpi: ['mpich', 'openmpi']
	env:
	PYTHON: ${{ matrix.python }}
	MPI: ${{ matrix.mpi }}
	ENV_FILE: ci/env-${{ matrix.mpi }}.yml
	OMPI_MCA_rmaps_base_oversubscribe: '1'
	OMPI_ALLOW_RUN_AS_ROOT: '1'
	OMPI_ALLOW_RUN_AS_ROOT_CONFIRM: '1'
	steps:
	- uses: actions/checkout@v2
	- name: Cache conda
	uses: actions/cache@v2
	env:
	# Increase this value to reset cache if ci/environment.yml has not changed
	CACHE_NUMBER: 0
	with:
	path: ~/conda_pkgs_dir
	key: ${{ runner.os }}-conda-${{ env.CACHE_NUMBER }}-${{ hashFiles( env.ENV_FILE ) }}
	- name: Setup miniconda
	uses: conda-incubator/setup-miniconda@v2
	with:
	activate-environment: dask-mpi-dev # Defined in ci/env-mpi.yml
	auto-update-conda: false
	python-version: ${{ matrix.python }}
	environment-file: ${{ env.ENV_FILE }}
	use-only-tar-bz2: true # IMPORTANT: This needs to be set for caching to work properly!
	- name: Install package
	run: python -m pip install --no-deps -e .
	- name: Check Installation
	run: \|
	conda list
	pip list
	- name: Run Tests
	run: pytest --junitxml=test-reports/junit.xml --cov=./ dask_mpi/tests/ --verbose
	- name: Upload code coverage to Codecov
	uses: codecov/codecov-action@v1
	with:
	file: ./coverage.xml
	flags: unittests
	env_vars: PYTHON,MPI
	name: codecov-umbrella
	fail_ci_if_error: false

Provide feedback