Move PyPi checks to twine

Author: gaborbernat

setup.py

@@ -70,9 +70,6 @@ def main():
             "console_scripts": ["tox=tox:cmdline", "tox-quickstart=tox._quickstart:main"]
         },
         python_requires=">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*",
-        setup_requires=[
-            "setuptools-scm"
-        ],  # needed for https://github.com/pypa/readme_renderer/issues/118
         install_requires=[
             "setuptools  >= 30.0.0",
             "pluggy >= 0.3.0, <1",

tox.ini

@@ -40,10 +40,12 @@ commands = sphinx-build -d "{toxworkdir}/docs_doctree" docs "{toxworkdir}/docs_o
 [testenv:package_description]
 description = check that the long description is valid
 basepython = python3.7
-deps = readme-renderer >= 21.0
+deps = twine >= 1.12.1
+       pip >= 18.0.0
 skip_install = true
 extras =
-commands = python setup.py check -r -s
+commands = pip wheel -w {envtmpdir}/build --no-deps .
+           twine check {envtmpdir}/build/*
 
 [testenv:fix_lint]
 description = format the code base to adhere to our styles, and complain about what we cannot do automatically