fix lxml versions #27

	name: CI

	on:
	- push
	- pull_request
	- workflow_dispatch

	jobs:
	main:
	strategy:
	matrix:
	python: [3.7, 3.8, 3.9, '3.10', '3.11']
	fail-fast: false
	runs-on: ubuntu-latest
	name: Python ${{ matrix.python }}
	steps:
	- uses: actions/checkout@v4
	- name: set up Python
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python }}
	- name: apt update
	run:
	sudo apt-get update
	- name: apt install pdfgrep
	run:
	sudo apt-get install pdfgrep
	- name: prepare pip
	run:
	python -m pip install --upgrade pip wheel
	- name: install package
	run: \|
	python -m pip install -r requirements.txt
	python -m pip install .[dev]
	- name: run tests
	run:
	python -m unittest discover --verbose --start-directory tests
	- name: install flake8
	run:
	python -m pip install flake8 pep8-naming
	- name: run pycodestyle
	run:
	flake8

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