Use micromamba not setup-python

Author: Joseph-Edwards

.github/workflows/tests.yml

@@ -25,32 +25,29 @@ jobs:
         shell: bash -l {0}
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
+      - name: "Setup ccache . . ."
+        uses: Chocobo1/setup-ccache-action@v1
         with:
-          python-version: ${{ matrix.python_version }}
-          cache: "pip"
-      - run: pip install -r requirements.txt
+          update_packager_index: false
+          install_ccache: true
       - name: "Create micromamba environment"
         uses: mamba-org/setup-micromamba@v1
         with:
           environment-name: libsemigroups
           create-args: >-
+            python=${{ matrix.python_version }}
             libsemigroups
       - name: "Set environment variables . . ."
         run: |
           echo "PKG_CONFIG_PATH=$MAMBA_ROOT_PREFIX/envs/libsemigroups/lib/pkgconfig:$MAMBA_ROOT_PREFIX/envs/libsemigroups/share/pkgconfig:/usr/local/lib/pkgconfig" >> $GITHUB_ENV
           echo "LD_LIBRARY_PATH=$MAMBA_ROOT_PREFIX/envs/libsemigroups/lib:/usr/local/lib" >> $GITHUB_ENV
           echo "PATH=$MAMBA_ROOT_PREFIX/envs/libsemigroups/bin:$PATH" >> $GITHUB_ENV
-      - name: "Setup ccache . . ."
-        uses: Chocobo1/setup-ccache-action@v1
-        with:
-          update_packager_index: false
-          install_ccache: true
       - name: "Python version . . ."
         run: |
           python --version
-          pip3 --version
-      - name: "Pip3 installing libsemigroups_pybind11 . . ."
+          pip --version
+      - run: pip install -r requirements.txt
+      - name: "Pip installing libsemigroups_pybind11 . . ."
         run: |
           CXX="${{ matrix.compiler }}" pip3 install . -v
       - name: "python -m pytest -vv tests/test_*.py . . ."