refactor: use absolute imports; move tests outside package #122

	name: Test
	on:
	- push

	jobs:
	TestLib:
	name: Test Library @ Python ${{ matrix.python-version }}
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version:
	- "3.7"
	- "3.8"
	- "3.9"
	steps:
	- uses: actions/checkout@master
	- name: Setup Python
	uses: actions/setup-python@v1
	with:
	python-version: ${{ matrix.python-version }}
	architecture: x64
	- name: Install requirements
	run: python -m pip install -r vigobus/requirements.txt
	- name: Install test requirements
	run: python -m pip install -r vigobus/requirements.test.txt

	- name: Test (unit)
	working-directory: vigobus
	run: pytest -sv . -m "not real"

	- name: Test (real)
	if: ${{ matrix.python-version == '3.9' }}
	working-directory: vigobus
	run: pytest -sv . -m "real and not heavy"

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