Update CI for Windows/macOS

Author: alexcrichton

.github/workflows/main.yml

@@ -7,18 +7,27 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        rust: [stable, beta, nightly]
-        os: [ubuntu-latest, windows-latest]
+        include:
+          - os: ubuntu-latest
+            rust: stable
+          - os: ubuntu-latest
+            rust: beta
+          - os: ubuntu-latest
+            rust: nightly
+          - os: macos-latest
+            rust: stable
+          - os: windows-latest
+            rust: stable
     steps:
     - uses: actions/checkout@v4
     - name: Install Rust (
       run: rustup update ${{ matrix.rust }} && rustup default ${{ matrix.rust }}
+      shell: bash
     - run: cargo test
     - run: cargo test --features debug
     - run: cargo test --features global
     - run: cargo test --release
     - run: cargo test --features debug --release
-      if: matrix.os == 'ubuntu-latest'
     - run: RUSTFLAGS='--cfg test_lots' cargo test --release
     - run: RUSTFLAGS='--cfg test_lots' cargo test --release --features debug