qa: Check that long description will render correctly on PyPI

And remove `readme-renderer` development dependency, which was (I
suppose) meant to be used to to the same thing... but not used (unless
I missed it).

Author: dbaty

Makefile

@@ -13,6 +13,7 @@ quality:
 	pylint --reports=no --score=no setup.py src tests
 	python setup.py check --strict --metadata --restructuredtext
 	check-manifest
+	python setup.py sdist >/dev/null 2>&1 && twine check dist/*
 
 Quality:  # not used in tests
 	vulture --exclude=build/ src tests setup.py

requirements-dev.txt

@@ -10,7 +10,6 @@ sphinx_rtd_theme
 check-manifest
 pylint
 pytest
-readme-renderer
 vulture
 
 # Release

setup.cfg

@@ -6,6 +6,7 @@ author_email = [email protected]
 url = https://github.com/Polyconseil/zbarlight
 description = A simple zbar wrapper
 long_description = file: README.rst
+long_description_content_type = text/x-rst
 license = BSD 3-Clause License
 keywords = zbar, QR code reader
 classifiers =