Merge branch 'tests' into 'master'

.gitlab-ci.yml

src/archive_extractor_worker.py

tests/conftest.py

tests/test.py

tests/testdata/input/dices.png

tests/testdata/input/empty.txt

tests/testdata/input/input_dir/hello.txt

.../input_dir/inner_input_dir/inner_inner_input_dir/.gitkeep

tests/testdata/input/input_dir/inner_input_dir/quote.txt

tests/testdata/input/script.sh

tests/testdata/output/.gitkeep

tox.ini