Fix LoggerAdapter.process first argument (#2153)
Fix LoggerAdapter.process first argument (#2153)

Standard implementation is:
```
def process(self, msg, kwargs):
    kwargs["extra"] = self.extra
    return msg, kwargs
```
so the signature is clearly `(Text, ...) -> (Text, ...)` (or `(str, ...) -> (str, ...)`, but following the other stubs here, I gather it's `Text`).
euresti/typeshed,li-dan/typeshed