Update check test for the README.rst file.

Signed-off-by: Tim 'mithro' Ansell <me@mith.ro>

requirements.txt

diff --git a/requirements.txt b/requirements.txt
index 31ca074..a23fd97 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
+docutils
 lxml
 pyjson
 -e git://github.com/SymbiFlow/vtr-xml-utils#egg=vtr-xml-utils

setup.py

diff --git a/setup.py b/setup.py
index cd18169..55a9729 100644
--- a/setup.py
+++ b/setup.py
@@ -25,7 +25,7 @@
     description="Python library for generating VPR architecture \
                 description files from Verilog models.",
     long_description=long_description,
-    long_description_content_type="text/markdown",
+    long_description_content_type="text/x-rst",
     url="https://github.com/SymbiFlow/python-symbiflow-v2x",
     packages=setuptools.find_packages(),
     install_requires=[

tox.ini

diff --git a/tox.ini b/tox.ini
index 510194d..7f11013 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,17 +12,13 @@
     py39: python3.9
 deps =
     check-manifest
-    # If your project uses README.rst, uncomment the following:
-    # readme_renderer
+    readme_renderer
     flake8
     pytest
 commands =
     check-manifest --ignore tox.ini,tests,*.pyc,*.swp
     python --version
-    # This repository uses a Markdown long_description, so the -r flag to
-    # `setup.py check` is not needed. If your project contains a README.rst,
-    # use `python setup.py check -m -r -s` instead.
-    python setup.py check -m -s
+    python setup.py check -m -r -s
     flake8 setup.py v2x
     pytest --doctest-modules -vv v2x
     pytest -vv