Add a new test to check that extras pkgs can be installed #665

	name: Check coding style

	on: [push]

	jobs:
	pycodestyle:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Set up Python
	uses: actions/setup-python@v4
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install pycodestyle
	if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
	- name: pycodestyle
	run: \|
	pycodestyle

	pydocstyle:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Set up Python
	uses: actions/setup-python@v2
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install pydocstyle
	if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
	- name: pydocstyle
	run: \|
	pydocstyle

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