Remove optional integer typing to avoid bug in Python 3.5.2 and lower. (see: https://stackoverflow.com/questions/42942867/optionaltypefoo-raises-typeerror-in-python-3-5-2)
Remove optional integer typing to avoid bug in Python 3.5.2 and lower.
(see: https://stackoverflow.com/questions/42942867/optionaltypefoo-raises-typeerror-in-python-3-5-2)

vovanbo/aiohttp_json_api