update github-action with pixi

Author: looooo

.github/workflows/tests.yml

@@ -7,21 +7,14 @@ jobs:
     strategy:
         fail-fast: false
         matrix:
-            python-version: [3.8, 3.9, 3.10, 3.11]
             os: [macOs-latest, ubuntu-latest, windows-latest]
 
     runs-on: ${{ matrix.os }}
-    name: run tests
+    name: test
     steps:
-      - uses: actions/checkout@v2
-      - name: Set up Python
-        uses: actions/setup-python@v1
-        with:
-            python-version: ${{ matrix.python-version }}
-      - name: install requirements
-        run: |
-          pip install .
-          pip install meshpy
-      - name: test
-        run: |
-          python testall.py
+    - uses: actions/checkout@v3
+    - uses: prefix-dev/[email protected]
+      with:
+        pixi-version: v0.39.0
+        cache: true
+    - run: pixi run test