add python 3.9, 3.10, 3.11 support, drop Travis CI configuration for GitHub CI #10

	# run test suites

	name: Tests
	on:
	- pull_request
	- push

	jobs:
	# see: https://github.com/fkirc/skip-duplicate-actions
	skip_duplicate:
	continue-on-error: true
	runs-on: ubuntu-latest
	outputs:
	should_skip: ${{ steps.skip_check.outputs.should_skip }}
	steps:
	- id: skip_check
	uses: fkirc/skip-duplicate-actions@master
	with:
	concurrent_skipping: "same_content"
	skip_after_successful_duplicate: "true"
	do_not_skip: '["pull_request", "workflow_dispatch", "schedule"]'

	# see: https://github.com/actions/setup-python
	tests:
	needs: skip_duplicate
	if: ${{ needs.skip_duplicate.outputs.should_skip != 'true' }}
	runs-on: ${{ matrix.os }}
	continue-on-error: ${{ matrix.allow-failure }}
	strategy:
	matrix:
	os: [ubuntu-latest]
	python-version:
	- "3.7"
	- "3.8"
	- "3.9"
	- "3.10"
	- "3.11"
	allow-failure: [false]
	test-case: [tests]
	include:
	- os: ubuntu-20.04
	python-version: "3.6"
	allow-failure: false
	test-case: tests
	- os: ubuntu-latest
	python-version: "3.10"
	allow-failure: false
	test-case: linting
	steps:
	- uses: actions/checkout@v2
	with:
	fetch-depth: "0"
	- name: Setup Python
	uses: actions/setup-python@v2
	with:
	python-version: '${{ matrix.python-version }}'
	- name: Install Dependencies
	run: \|
	pip install -r requirements.txt
	pip install -r requirements-dev.txt
	python setup.py install
	- name: Display Packages
	run: pip freeze
	- if: ${{ matrix.test-case == 'linting' }}
	name: Run Linting Checks
	run: flake8
	- if: ${{ matrix.test-case == 'tests' }}
	name: Run Tests
	run: py.test -v tests

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