[ENH] minor improvements to CI (#144)

Makes minor improvements to the CI:

* single install command for the `sklearn` job, to avoid dependency
resolution issues - two-step installs can lead to dependency conflicts
and cause uninstall and reinstall of packages installed in step one
* add step in all jobs to show installed packages and versions after
installation, this is a useful diagnostic
* replace empty space by dash in name of `sklearn` job
* fix typos

Author: fkiraly

.github/workflows/test.yml

@@ -42,6 +42,9 @@ jobs:
 
           make install-no-extras-for-test
 
+      - name: Show dependencies
+        run: python -m pip list
+
       - name: Test with pytest
         run: |
           python -m pytest tests -p no:warnings
@@ -77,6 +80,9 @@ jobs:
 
           make install-all-extras-for-test
 
+      - name: Show dependencies
+        run: python -m pip list
+
       - name: Test with pytest
         run: |
           python -m pytest tests --cov=hyperactive --cov-report=term-missing --cov-report=xml -p no:warnings
@@ -86,7 +92,7 @@ jobs:
           python -m pytest src/hyperactive -p no:warnings
 
   test-sklearn-versions:
-    name: test-sklearn-${{ matrix.sklearn-version }} python-${{ matrix.python-version }}
+    name: test-sklearn-${{ matrix.sklearn-version }}-python-${{ matrix.python-version }}
     runs-on: ubuntu-latest
 
     strategy:
@@ -98,18 +104,19 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Set up Python 3.12
+      - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
 
       - name: Install dependencies for scikit-learn ${{ matrix.sklearn-version }}
         run: |
           python -m pip install --upgrade pip
-          python -m pip install build pytest
-          make install
-          python -m pip install scikit-learn==${{ matrix.sklearn-version }}
+          python -m pip install .[all_extras,test] scikit-learn==${{ matrix.sklearn-version }}
+
+      - name: Show dependencies
+        run: python -m pip list
 
       - name: Run sklearn integration tests for ${{ matrix.sklearn-version }}
         run: |
-          python -m pytest -x -p no:warnings tests/integrations/sklearn/
+          python -m pytest -x -p no:warnings tests/integrations/sklearn/