Add feature matrix

Author: sunsided

.github/workflows/rust.yml

@@ -40,15 +40,19 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest, macos-latest, windows-latest ]
+        features:
+          - '--all-features'
+          # - '--no-default-features'
+          # - ''
     steps:
       - uses: actions/checkout@v4
       - name: Build
         run: cargo build --verbose
       - uses: taiki-e/install-action@nextest
       - name: Run tests
-        run: cargo nextest run --verbose --all-features
+        run: cargo nextest run --verbose ${{ matrix.features }}
       - name: Run doctests
-        run: cargo test --doc --verbose --all-features
+        run: cargo test --doc --verbose ${{ matrix.features }}
 
   codecov:
     needs: lint