ENH: Add aarch64 wheels

.github/workflows/wheels.yml

@@ -58,13 +58,15 @@ jobs:
       fail-fast: false
       matrix:
         buildplat:
-          - [ubuntu-20.04, musllinux_x86_64]
-          - [macos-12, macosx_*]
-          - [windows-2019, win_amd64]
+          - [ubuntu-latest, musllinux_x86_64]
+          - [ubuntu-latest, manylinux_aarch64]
+          - [macos-13, macosx_x86_64]  # native Intel hardware
+          - [windows-latest, win_amd64]
         python: ["cp38", "cp39", "cp310", "cp311", "cp312"]
         include:
-          # Manylinux builds are cheap, do all in one
-          - { buildplat: ["ubuntu-20.04", "manylinux_x86_64"], python: "*" }
+          # Manylinux and arm64 builds (on native hardware) are cheap, do all in one
+          - { buildplat: ["ubuntu-latest", "manylinux_x86_64"], python: "*" }
+          - { buildplat: ["macos-14", "macosx_arm64"], python: "*" }
 
     steps:
       - uses: actions/checkout@v3
@@ -76,6 +78,13 @@ jobs:
       - name: Update pip/pipx
         run: pip install --upgrade pip pipx
 
+      # For aarch64 support
+      # https://cibuildwheel.pypa.io/en/stable/faq/#emulation
+      - uses: docker/setup-qemu-action@v3
+        with:
+          platforms: all
+        if: runner.os == 'Linux' && endsWith(matrix.buildplat[1], 'aarch64')
+
       - name: Build wheel(s)
         run: pipx run --spec "cibuildwheel>=2.15" cibuildwheel
         env: