"Wrong version of PyObjC C API" -> updated pyobjc -> AttributeError: CFMachPortCreateRunLoopSource

I just installed aw-watcher-input with poetry.
When I run `aw-watcher-input --help` I get `RuntimeError: Wrong version of PyObjC C API (got 21, expected 20)`.

What would be required to update aw-watcher-input to work with version 21?

Here's the full stacktrace:

```
Traceback (most recent call last):
File "/Users/dbieber/.virtualenvs/aw/bin/aw-watcher-input", line 2, in
from aw_watcher_input.main import main
File "/Users/dbieber/code/github/ActivityWatch/aw-watcher-input/src/aw_watcher_input/__init__.py", line 1, in
from . import main
File "/Users/dbieber/code/github/ActivityWatch/aw-watcher-input/src/aw_watcher_input/main.py", line 9, in
from aw_watcher_afk.listeners import KeyboardListener, MouseListener
File "/Users/dbieber/.virtualenvs/aw/lib/python3.7/site-packages/aw_watcher_afk/__init__.py", line 1, in
from . import __main__
File "/Users/dbieber/.virtualenvs/aw/lib/python3.7/site-packages/aw_watcher_afk/__main__.py", line 5, in
from aw_watcher_afk.afk import AFKWatcher
File "/Users/dbieber/.virtualenvs/aw/lib/python3.7/site-packages/aw_watcher_afk/afk.py", line 17, in
from .macos import seconds_since_last_input
File "/Users/dbieber/.virtualenvs/aw/lib/python3.7/site-packages/aw_watcher_afk/macos.py", line 2, in
from Quartz.CoreGraphics import (CGEventSourceSecondsSinceLastEventType,
File "/Users/dbieber/.virtualenvs/aw/lib/python3.7/site-packages/Quartz/__init__.py", line 102, in
_load()
File "/Users/dbieber/.virtualenvs/aw/lib/python3.7/site-packages/Quartz/__init__.py", line 28, in _load
from Quartz import CoreGraphics as m
File "/Users/dbieber/.virtualenvs/aw/lib/python3.7/site-packages/Quartz/CoreGraphics/__init__.py", line 143, in
_load(mod)
File "/Users/dbieber/.virtualenvs/aw/lib/python3.7/site-packages/Quartz/CoreGraphics/__init__.py", line 51, in _load
import Quartz.CoreGraphics._callbacks as m
RuntimeError: Wrong version of PyObjC C API (got 21, expected 20)
```