Add twinecheck.

Author: wRAR

.github/workflows/main.yml

@@ -51,6 +51,9 @@ jobs:
         - python-version: "3.13"
           env:
             TOXENV: docs
+        - python-version: "3.13"
+          env:
+            TOXENV: twinecheck
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python-version }}

setup.py

@@ -10,6 +10,7 @@
     license='BSD',
     description='Scrapy middleware for Zyte Smart Proxy Manager',
     long_description=readme,
+    long_description_content_type="text/x-rst",
     maintainer='Raul Gallegos',
     maintainer_email='[email protected]',
     author='Zyte',

tox.ini

@@ -64,3 +64,12 @@ changedir = {[docs]changedir}
 deps = {[docs]deps}
 commands =
     sphinx-build -nW -b html . {envtmpdir}/html
+
+[testenv:twinecheck]
+basepython = python3
+deps =
+    twine==5.1.1
+    build==1.2.2
+commands =
+    python -m build --sdist
+    twine check dist/*