Generated code in latest version not compiling/missing OnPropertyChanged

**Description**
After upgrading to 1.1.0, `OnPropertyChanged` either does not get called, or `PropertyChanged.SourceGenerator.Internal.EventArgsCache.PropertyChanged_PropertyName` gets passed instead of property name.

**To Reproduce**
This only generated `OnPropertyChanging`, but not `OnPropertyChanged`.
```csharp
public sealed partial class TestModel
{
[Notify]
private decimal _total;
}
```

**Version Info**
- PropertyChanged.SourceGenerator version: 1.1.0
- Roslyn Version: Compiler version: '4.5.0-6.23127.3 (e2bc27d2)'. Language version: 11.0.

**Additional Info**
Upgrading to this version also caused various issues in Rider.
I had to clear caches/restart it multiple times to even reproduce the simple case.