PyPI deployment

Deploy on TestPyPI or PyPI

* create virtual environment `python -m venv /path/to/venv`
* activate venv
* python -m pip install --upgrade pip
* pip install twine
* pip install wheel
* python setup.py sdist bdist_wheel
* ls dist
* make sure you have the TestPyPI and PyPI repository URLs in your ~/.pypirc
* make sure you have the path to your certificate bundle in your ~/.pypirc

```.pypirc
[distutils]
index-servers = 
	testpypi
	pypi
cert = <path to your certificate bundle>

[testpypi]
repository = https://test.pypi.org/legacy/
username = __token__
password = <your token>

[pypi]
repository = https://upload.pypi.org/legacy/
username = __token__
password = <your token>
```

* python -m twine upload --repository testpypi dist/*

Test if the package can be installed via pip.
* check if your pip.ini has proxies and certificates, e.g.

```pip.ini
[global]
proxy = <your proxy>
trusted-host = pypi.org
               test.pypi.org
               pypi.python.org
               files.pythonhosted.org
               test-files.pythonhosted.org
cert = <path to your certificate bundle>
```

* pip install <your package> --index-url https://test.pypi.org/simple/