After submitting a pull request to orjson repository, the author has changed the library and "obj" parameter is now positional only.
Not this behavior is aligned with the stub file and the change can be reverted.
https://github.com/ijl/orjson/releases/tag/3.0.1
Updated orjson.pyi to support two new added flags `OPT_INDENT_2` and `OPT_NON_STR_KEYS`.
Renamed `__obj` to `obj` to allow using named parameter `obj` instead of positional, without getting errors.