Add code of conduct #116

	name: Build and publish to TestPyPI or PyPI
	on: [push, pull_request]

	jobs:
	build-n-publish:
	name: Build package and publish to (Test)PyPI
	runs-on: ubuntu-20.04
	steps:
	- uses: actions/checkout@v2
	with:
	fetch-depth: 0
	- name: Set up Python 3.x
	uses: actions/setup-python@v2
	with:
	python-version: '3.x'
	- name: Build source tarballs and wheels
	run: \|
	python -m pip install --upgrade pip
	python -m pip install build
	python -m build
	- name: Publish distribution 📦 to Test PyPI
	if: github.ref == 'refs/heads/master' && github.repository == 'brian-team/brian2cuda'
	run: \|
	python -m pip install twine
	twine upload -r testpypi dist/*
	env:
	TWINE_USERNAME: __token__
	TWINE_PASSWORD: ${{ secrets.TEST_PYPI_API_TOKEN }}
	- name: Publish distribution release 📦 to PyPI
	if: ${{ startsWith(github.ref, 'refs/tags/v') && github.repository == 'brian-team/brian2cuda' }}
	run: \|
	python -m pip install twine
	twine upload dist/*
	env:
	TWINE_USERNAME: __token__
	TWINE_PASSWORD: ${{ secrets.PYPI_API_TOKEN }}

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