Add clang tidy for more systems.

.github/workflows/lint.yml

@@ -44,15 +44,24 @@ jobs:
         scripts/lint.sh
 
   lint-cpp:
-    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v4
     - name: Install dependencies
       run: |
-        sudo apt update
-        sudo apt install clang-tidy -y
+        python -m pip install --upgrade pip
+        pip install clang-tidy
     - name: Analysing the code with clang-tidy
       shell: bash
       run: |
         set -eux pipefail
-        clang-tidy -checks=-*,clang-analyzer-*,-clang-analyzer-cplusplus* -extra-arg=-std=c++17 example/breeze_theme.hpp --
+
+        # Windows oddly requires C++20 support due to internal bugs.
+        extra_arg="-std=c++17"
+        if [[ "$RUNNER_OS" == "Windows" ]]; then
+            extra_arg="-std=c++20"
+        fi
+        clang-tidy -checks=-*,clang-analyzer-*,-clang-analyzer-cplusplus* -extra-arg="${extra_arg}" example/breeze_theme.hpp --