Restore aarch64 builds

Author: simoncozens

.github/workflows/wheels.yml

@@ -21,6 +21,12 @@ jobs:
 
       - uses: actions/setup-python@v2
 
+      - name: Set up QEMU
+        if: runner.os == 'Linux'
+        uses: docker/setup-qemu-action@v1
+        with:
+          platforms: all
+
       - name: Build wheels
         uses: pypa/[email protected]
         env:
@@ -30,6 +36,7 @@ jobs:
           CIBW_SKIP: "*-musllinux*"
           CIBW_REPAIR_WHEEL_COMMAND_MACOS: "DYLD_LIBRARY_PATH=/usr/local/lib delocate-listdeps {wheel} && DYLD_LIBRARY_PATH=/usr/local/lib delocate-wheel --require-archs {delocate_archs} -w {dest_dir} {wheel}"
           CIBW_ARCHS_MACOS: x86_64 universal2
+          CIBW_ARCHS_LINUX: x86_64 aarch64
 
       - uses: actions/upload-artifact@v2
         with: