fix: use py 3.9 and fix mypy (#57)

* fix: update .github workflows to use py 3.9

* fix: static type checker mypy needs these changes

typing.List is better than typing.Sequence, apparently in loaders.py and
install the types packages for Markdown and Python.

* fix: mypy fails because needs deps in setyp.py

We need to install the package even though it is a static checker because
it relies on some installed packages that contain type declarations.

Fixes: #56

.github/workflows/release.yaml

@@ -6,7 +6,7 @@ on:
 jobs:
   inspect:
     runs-on: ubuntu-latest
-    container: python:3.8
+    container: python:3.9
     steps:
       - uses: actions/checkout@v2
         with:
@@ -37,7 +37,7 @@ jobs:
           prerelease: false
   pypi_release:
     runs-on: ubuntu-latest
-    container: python:3.8
+    container: python:3.9
     needs:
       - inspect
       - github_release

.github/workflows/test.yaml

@@ -6,7 +6,7 @@ on:
 jobs:
   tests:
     runs-on: ubuntu-latest
-    container: python:3.8
+    container: python:3.9
     steps:
       - uses: actions/checkout@v2
       - name: Install package.
@@ -17,7 +17,7 @@ jobs:
         run: pytest
   build:
     runs-on: ubuntu-latest
-    container: python:3.8
+    container: python:3.9
     steps:
       - uses: actions/checkout@v2
       - name: Install package.
@@ -26,7 +26,7 @@ jobs:
         run: aip-site-gen tests/test_data/ /out/
   lint:
     runs-on: ubuntu-latest
-    container: python:3.8
+    container: python:3.9
     steps:
       - uses: actions/checkout@v2
       - name: Install the linter (flake8).
@@ -35,9 +35,11 @@ jobs:
         run: flake8 aip_site/ tests/
   mypy:
     runs-on: ubuntu-latest
-    container: python:3.8
+    container: python:3.9
     steps:
       - uses: actions/checkout@v2
+      - name: Install package.
+        run: pip install .
       - name: Install mypy.
         run: pip install mypy
       - name: Run mypy.

aip_site/jinja/loaders.py

@@ -74,7 +74,7 @@ def get_source(self, env, template: str) -> typing.Tuple[str, str, None]:
         # Return the template information.
         return contents, fn, None
 
-    def list_templates(self) -> typing.Sequence[str]:
+    def list_templates(self) -> typing.List[str]:
         answer = []
 
         # We sort the files in the directory to read more specific

setup.py

@@ -55,6 +55,8 @@
         'pyscss==1.3.7',
         'pyyaml==5.4.1',
         'six==1.16.0',
+        'types-Markdown==3.3.15',
+        'types-PyYAML==6.0.7',
         'werkzeug==2.0.1',
     ),
     python_requires='>=3.8',