Redo as a package to fix mypy issues (#215)

* Demo the mypy types issue

* Redo as a package

* Update setup.py

---------

Co-authored-by: Matt Seymour <mattaseymour@gmail.com>

.flake8

@@ -2,4 +2,4 @@
 max-line-length = 88
 extend-ignore = E203
 per-file-ignores=
-    test_dj_database_url.py: E501, E265
+    tests/test_dj_database_url.py: E501, E265

.github/workflows/test.yml

@@ -37,13 +37,19 @@ jobs:
 
       - name: Run mypy
         run: |
-          python -m mypy dj_database_url.py
+          python -m mypy dj_database_url
 
       - name: Run Tests
         run: |
           echo "$(python --version) / Django $(django-admin --version)"
-          coverage run --source=dj_database_url --branch -m unittest discover
+          coverage run --source=dj_database_url --branch -m unittest discover -v
           coverage report
           coverage xml
 
       - uses: codecov/codecov-action@v3
+
+      - name: Check mypy types installation
+        run: |
+          pip install .
+          cd tests
+          python -m mypy .

MANIFEST.in

@@ -1 +0,0 @@
-include py.typed

setup.py

@@ -13,10 +13,12 @@ setup(
     description="Use Database URLs in your Django Application.",
     long_description=readme,
     long_description_content_type="text/x-rst",
-    py_modules=["dj_database_url"],
+    packages=["dj_database_url"],
     install_requires=["Django>=3.2", "typing_extensions >= 3.10.0.0"],
-    zip_safe=False,
     include_package_data=True,
+    package_data={
+        "dj_database_url": ["py.typed"],
+    },
     platforms="any",
     project_urls={
         "GitHub": "https://github.com/jazzband/dj-database-url/",