Migrate tests to Python 3.13

Author: fedimser

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
       - uses: actions/checkout@v1
       - uses: actions/setup-python@v1
         with:
-          python-version: '3.7'
+          python-version: '3.13'
           architecture: 'x64'
       - name: Install requirements
         run: |
@@ -33,7 +33,7 @@ jobs:
       - uses: actions/checkout@v1
       - uses: actions/setup-python@v1
         with:
-          python-version: '3.7'
+          python-version: '3.13'
           architecture: 'x64'
       - name: Install requirements
         run: |