Experiment with building macOS ARM64 Python packages

.github/workflows/python.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         feature: [core, js]
-        os: [macos-11.0, ubuntu-18.04, windows-2019, self-hosted-linux-arm64]
+        os: [macos-11.0, ubuntu-18.04, windows-2019, self-hosted-linux-arm64, self-hosted-macos-arm64]
         python: [3.7, 3.8, 3.9, '3.10']
     steps:
       - uses: actions/checkout@v1
@@ -38,6 +38,7 @@ jobs:
           brew link python@${{ matrix.python }}
 
       - name: Set up Rust
+        if: runner.name != 'macos-arm64'
         uses: actions-rs/toolchain@v1
         with:
           toolchain: stable
@@ -49,6 +50,7 @@ jobs:
         run: .\.github\workflows\gcc.ps1
 
       - name: Set up Go
+        if: runner.name != 'macos-arm64'
         uses: actions/setup-go@v2
         with:
           go-version: '^1.14.0'