Remove `six` from production code #9

	---
	name: Test bmaptool

	on:
	- push
	- pull_request

	jobs:
	test:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version:
	- "3.8"
	- "3.9"
	- "3.10"
	- "3.11"
	- "3.12"
	steps:
	- uses: actions/checkout@v4
	- name: Setup Python ${{ matrix.python-version }}
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	sudo apt-get install -y pbzip2 pigz lzop liblz4-tool libgpgme11-dev
	python -m pip install --upgrade pip
	pip install build
	- name: Build package
	run: \|
	python -m build
	- name: Install package
	run: \|
	pip install -e .[dev]
	- name: Run tests
	run: \|
	python -m unittest -vb

	lint:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- uses: psf/black@stable

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