fix(binaries): Fix arm64 mac binary tags (#196)

I used docs on the [Python wheel format][] to determine that the bit
with the OS and CPU is called the "platform tag". Then I found a
[discussion of macOS platform tags][] that gave me the hint that arm64
wheels need to specify macOS 11 at a minimum.

[Python wheel format]: https://peps.python.org/pep-0427/
[discussion of macOS platform tags]:
pypa/wheel#387

Closes #194

binaries/build_wheels.py

@@ -39,8 +39,8 @@
     'manylinux2014_aarch64': '-linux-arm64',
     # macOS x64 with 10.9 SDK
     'macosx_10_9_x86_64': '-osx-x64',
-    # macOS arm64 with 10.9 SDK
-    'macosx_10_9_arm64': '-osx-arm64',
+    # macOS arm64 with 11.0 SDK
+    'macosx_11_0_arm64': '-osx-arm64',
     # Windows x64
     'win_amd64': '-win-x64.exe',
 }