macOS native: Python error on macOS: AttributeError: '_UnixSelectorEventLoop' object has no attribute '_signal_handlers'

**Describe the bug**
On macOS, python reports an error any time a notification is triggered / tested:

```
Exception ignored in:
Traceback (most recent call last):
File "/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/asyncio/base_events.py", line 683, in __del__
self.close()
File "/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/asyncio/unix_events.py", line 60, in close
for sig in list(self._signal_handlers):
AttributeError: '_UnixSelectorEventLoop' object has no attribute '_signal_handlers'
```

**Version**
v0.39.19.1

**To Reproduce**

Steps to reproduce the behavior:
1. Install changedetection.io: `pip install changedetection.io`
2. Edit a rule
3. Click the Notifications tab
4. Enter any valid notification, such as `macosx://`

**Expected behavior**
Notification works

**Desktop (please complete the following information):**
- OS: macOS Monterey 12.6
- Python 3.9.6 (built in to OS) and also Python 3.9.13 (installed via macports)