Add Python 3.13, 3.14, and free threaded 3.14t to the testing

Updated Python versions in CI workflow and upgraded actions.

Author: cclauss

.github/workflows/ci.yml

@@ -9,13 +9,13 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12']
+        python: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12', '3.13', '3.14', '3.14t']
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
-      - name: Setup python
-        uses: actions/setup-python@v4
+        uses: actions/checkout@v6
+      - name: Setup Python
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python }}
           allow-prereleases: true
@@ -35,7 +35,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12-dev']
+        python: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12', '3.13', '3.14', '3.14t']
         check_formatting: ['0']
         extra_name: ['']
         include:
@@ -44,15 +44,15 @@ jobs:
             extra_name: ', check formatting'
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
-      - name: Setup python
-        uses: actions/setup-python@v4
+        uses: actions/checkout@v6
+      - name: Setup Python
+        uses: actions/setup-python@v6
         if: "!endsWith(matrix.python, '-dev')"
         with:
           python-version: ${{ matrix.python }}
           cache: pip
           cache-dependency-path: test-requirements.txt
-      - name: Setup python (dev)
+      - name: Setup Python (dev)
         uses: deadsnakes/action@v3.0.1
         if: endsWith(matrix.python, '-dev')
         with:
@@ -71,12 +71,12 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12']
+        python: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12', '3.13', '3.14', '3.14t']
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
-      - name: Setup python
-        uses: actions/setup-python@v4
+        uses: actions/checkout@v6
+      - name: Setup Python
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python }}
           allow-prereleases: true