Add future annotations to all the files #61

	# This workflow will install Python dependencies, run tests and lint with a single version of Python
	# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions

	name: Functionality test

	on:
	push:
	branches: [ main, stable ]
	pull_request:
	branches: [ main ]

	jobs:
	build:

	runs-on: ubuntu-latest

	strategy:
	matrix:
	python-version: [3.8]
	include:
	- python-version: 3.8
	code-cov: true
	fail-fast: false
	max-parallel: 2

	steps:
	- uses: actions/checkout@v2
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install flake8 pytest pytest-cov
	if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
	- name: Lint with flake8
	run: \|
	# stop the build if there are Python syntax errors or undefined names
	flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
	# exit-zero treats all errors as warnings. The GitHub editor is 120 chars wide
	flake8 . --count --exit-zero --max-complexity=10 --max-line-length=120 --statistics
	- name: Test with pytest
	run: \|
	if [ ${{ matrix.code-cov }} ]; then
	codecov='--cov=tpe/optimizer --cov-report=xml --cov-config=.coveragerc';
	fi
	python -m pytest -W ignore -v $codecov test
	- name: Upload coverage
	if: matrix.code-cov && always()
	uses: codecov/codecov-action@v1
	with:
	fail_ci_if_error: true
	verbose: true

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