add testing for python 3.13

Signed-off-by: Zen <[email protected]>

Author: desultory

.github/workflows/unit_tests.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.11", "3.12"]
+        python-version: ["3.11", "3.12", "3.13"]
 
     steps:
     - uses: actions/checkout@v4
@@ -32,7 +32,7 @@ jobs:
         venv/bin/pip install --upgrade pip
         venv/bin/pip install ./zenlib
         venv/bin/pip install .
-    - name: Test with pytest
+    - name: Run unit tests
       run: |
         cd tests
         ../venv/bin/python -m unittest -v