chore: sync mypy baseline after typing consumer items

Author: turnipdabeets

mypy-baseline.txt

@@ -4,7 +4,6 @@ posthog/request.py:0: note: (or run "mypy --install-types" to install all missin
 posthog/request.py:0: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
 posthog/request.py:0: error: Incompatible types in assignment (expression has type "bytes", variable has type "str")  [assignment]
 posthog/consumer.py:0: error: Name "Empty" already defined (possibly by an import)  [no-redef]
-posthog/consumer.py:0: error: Need type annotation for "items" (hint: "items: list[<type>] = ...")  [var-annotated]
 posthog/consumer.py:0: error: Unsupported operand types for <= ("int" and "str")  [operator]
 posthog/consumer.py:0: note: Right operand is of type "int | str"
 posthog/consumer.py:0: error: Unsupported operand types for < ("str" and "int")  [operator]