tox: disable development mode explicit
tox: disable development mode explicit

Signed-off-by: Florian Scherf <01ea296d94b35b47de034b473506bbbc8961ebf2@pengutronix.de>

pengutronix/aiohttp-json-rpc,pengutronix/aiohttp-json-rpc,pengutronix/aiohttp-json-rpc