Add matrix testing for unittest

.github/workflows/unittest.yml

@@ -7,6 +7,8 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       max-parallel: 5
+      matrix:
+        python-version: ["3.10", "3.11", "3.12"]
     services:  # Required for Slurm cluster
       mysql:
         image: mysql:8.0
@@ -27,7 +29,7 @@ jobs:
         echo $CONDA/bin >> $GITHUB_PATH
     - name: Install dependencies
       run: |
-        conda install -y python=3.10.14 # https://github.com/conda/conda/issues/13560#issuecomment-1992720842
+        conda install -y python=${{ matrix.python-version }} # https://github.com/conda/conda/issues/13560#issuecomment-1992720842
         conda env update --file dev-env.yml --name base
     - name: Install RunSolver dependencies
       run: |