Add Python 3.12 to CI matrix (#204)

* Add Python 3.12 to CI matrix

Also run build and lint CI jobs to ensure that building and linting
works for older Python versions.

* Update typing_extensions to fix TypeVar error on Python 3.12

* Upgrade flake8 and its dependencies

In an attempt to fix a flake8.exceptions.FailedToLoadPlugin error on
Python 3.12.

.github/workflows/build.yml

@@ -14,15 +14,19 @@ jobs:
   build:
     runs-on: ubuntu-latest
 
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+
     steps:
     - uses: actions/checkout@v3
       with:
         submodules: recursive
-
-    - name: Install Python 3
+    - name: Install Python ${{ matrix.python-version }}
       uses: actions/setup-python@v3
       with:
-        python-version: "3.11"
+        python-version: ${{ matrix.python-version }}
 
     - name: Setup Graphviz
       uses: ts-graphviz/setup-graphviz@v1

.github/workflows/lint.yml

@@ -13,15 +13,19 @@ jobs:
   lint:
     runs-on: ubuntu-latest
 
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+
     steps:
       - uses: actions/checkout@v3
         with:
           submodules: recursive
-
-      - name: Install Python 3
+      - name: Install Python ${{ matrix.python-version }}
         uses: actions/setup-python@v3
         with:
-          python-version: "3.11"
+          python-version: ${{ matrix.python-version }}
 
       - name: Setup Graphviz
         uses: ts-graphviz/setup-graphviz@v1

.github/workflows/publish.yml

@@ -25,7 +25,7 @@ jobs:
     - name: Install Python 3
       uses: actions/setup-python@v3
       with:
-        python-version: "3.11"
+        python-version: "3.12"
 
     - name: Setup Graphviz
       uses: ts-graphviz/setup-graphviz@v1

.github/workflows/tests.yml

@@ -16,13 +16,13 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
 
     steps:
     - uses: actions/checkout@v3
       with:
         submodules: recursive
-    - name: Set up Python ${{ matrix.python-version }}
+    - name: Install Python ${{ matrix.python-version }}
       uses: actions/setup-python@v3
       with:
         python-version: ${{ matrix.python-version }}

requirements.txt

@@ -4,9 +4,9 @@ cached_method==0.1.0
 click==8.1.3
 coloraide==1.8.2
 coverage==6.4.4
-flake8==6.0.0
+flake8==7.0.0
 flake8-black==0.3.6
-flake8-isort==6.0.0
+flake8-isort==6.1.1
 Flake8-pyproject==1.2.3
 frozendict==2.3.4
 isort==5.10.1
@@ -18,12 +18,12 @@ nose2==0.12.0
 packaging==23.0
 pathspec==0.11.1
 platformdirs==3.2.0
-pycodestyle==2.10.0
+pycodestyle==2.11.1
 pydot==1.4.2
-pyflakes==3.0.1
+pyflakes==3.2.0
 pygraphviz==1.10
 pyparsing==3.0.9
 pyproject_hooks==1.0.0
 tomli==2.0.1
 types-frozendict==2.0.9
-typing_extensions==4.5.0
+typing_extensions==4.9.0