ci: Test with the 4 latest major versions of scikit-learn

.github/workflows/skore.yml

@@ -10,24 +10,38 @@ defaults:
 jobs:
   test-skore:
     strategy:
-      fail-fast: true
+      fail-fast: false
       matrix:
         os: ["ubuntu-latest", "windows-latest"]
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python: ["3.9", "3.10", "3.11", "3.12"]
+        scikit-learn: ["1.6"]
+        include:
+          - os: "ubuntu-latest"
+            python: "3.12"
+            scikit-learn: "1.3"
+          - os: "ubuntu-latest"
+            python: "3.12"
+            scikit-learn: "1.4"
+          - os: "ubuntu-latest"
+            python: "3.12"
+            scikit-learn: "1.5"
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
-          python-version: ${{ matrix.python-version }}
+          python-version: ${{ matrix.python }}
           cache: "pip"
       - name:
         timeout-minutes: 10
         run: |
+          set -u
+
           # Install dependencies
-          python -m pip install --upgrade pip
-          python -m pip install --upgrade pre-commit
-          python -m pip install --upgrade build
+          python -m pip install --upgrade "pip"
+          python -m pip install --upgrade "pre-commit"
+          python -m pip install --upgrade "build"
+          python -m pip install --upgrade "scikit-learn ==${{ matrix.scikit-learn }}"
 
           # Lint
           pre-commit run --all-files ruff