Make it possible to abort signing if keys cannot be loaded, improve cli error handling #1056

	on: [push, pull_request]

	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ["3.7", "3.8", "3.9", "3.10"]
	steps:
	- uses: actions/checkout@v3
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v3
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	sudo apt-get update
	sudo apt-get install libhdf5-serial-dev zlib1g-dev libatlas-base-dev lcov swig3.0 libpcsclite-dev
	mkdir -p ~/bin/ && ln -s /usr/bin/swig3.0 ~/bin/swig && export PATH=~/bin/:$PATH
	pip install -e .[ci,test,yubikey] # Install with CI deps
	- name: Run pre-commit and test with pytest
	run: \|
	pre-commit run --all-files
	pytest taf/tests

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