Unpin flit-core dependency #17

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	---
	name: CI

	on: [push, pull_request]

	jobs:
	lint:
	name: "Lint checks"
	runs-on: "ubuntu-latest"
	steps:
	- uses: "actions/checkout@v2"
	- uses: "actions/setup-python@v2"
	with:
	python-version: "3.9"

	- name: "Install dependencies"
	run: \|
	set -xe
	pip install --upgrade pip
	pip install --upgrade nox

	- name: "Run nox linting session"
	run: "nox -s check"

	tests:
	name: "Python ${{ matrix.python-version }}"
	runs-on: "ubuntu-latest"
	env:
	USING_COVERAGE: "3.9"

	strategy:
	matrix:
	python-version: ["3.6", "3.7", "3.8", "3.9", "3.10"]

	steps:
	- uses: "actions/checkout@v2"
	- uses: "actions/setup-python@v2"
	with:
	python-version: "${{ matrix.python-version }}"

	- name: "install dependencies"
	run: \|
	set -xe
	python -vv
	pip install --upgrade pip
	pip install --upgrade nox

	- name: "Run nox session for ${{ matrix.python-version }}"
	run: "python -m nox -s test-${{ matrix.python-version }}"

	- name: "Upload Coverage"
	run: \|
	set -xe
	pip install --upgrade codecov
	codecov --required

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