Add matrix test + set baseline version to 3.13 (#47)

Author: inverse

.github/workflows/main.yml

@@ -21,7 +21,7 @@ jobs:
           ${{ runner.os }}-poetry-
     - uses: actions/setup-python@v5
       with:
-        python-version: '3.11'
+        python-version: '3.13'
     - name: Install poetry
       uses: abatilo/actions-poetry@v4.0.0
       with:
@@ -31,17 +31,20 @@ jobs:
     - uses: pre-commit/action@v3.0.1
   test:
     runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        python-version: ['3.13', '3.12', '3.11', '3.10']
     steps:
     - uses: actions/checkout@master
     - uses: actions/cache@v4
       with:
         path: ~/.local/share/virtualenvs
-        key: ${{ runner.os }}-poetry-${{ hashFiles('poetry.lock') }}
+        key: ${{ runner.os }}-${{ matrix.python-version }}-poetry-${{ hashFiles('poetry.lock') }}
         restore-keys: |
           ${{ runner.os }}-poetry-
     - uses: actions/setup-python@v5
       with:
-        python-version: '3.11'
+        python-version: '${{ matrix.python-version }}'
     - name: Install poetry
       uses: abatilo/actions-poetry@v4.0.0
       with: