Upgrade GitHub Actions and test Python 3.12

.github/workflows/test.yml

@@ -8,20 +8,20 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.6, 3.7, 3.8, 3.9, "3.10", "3.11", pypy3]
+        python-version: [3.6, 3.7, 3.8, 3.9, "3.10", 3.11, 3.12, pypy3]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
 
       - name: Cache
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         with:
           path: ~/.cache/pip
           key:
@@ -32,8 +32,8 @@ jobs:
 
       - name: Install dependencies
         run: |
-          python3 -m pip install -U pip
-          python3 -m pip install -U wheel setuptools
+          python3 -m pip install --upgrade pip
+          python3 -m pip install --upgrade setuptools wheel
           python3 -m pip install sphinx
           python3 -m pip install ".[test,twisted]"
 

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py36,py37,py38,py39,py310,py311,pypy3
+envlist = py36,py37,py38,py39,py310,py311,py312,pypy3
 minversion = 1.6
 
 [testenv]