Fix bug so max_retries can be overridden to zero in message options

[chrisittner]

Hi 👋,

small bugfix for the following issue that I stumbled over:

@dramatiq.actor(max_retries=99)
def do_work():
    raise Exception("attempt failed")

do_work.send_with_options(max_retries=0)

-> do_work will be retried 100 times instead of once, even though message options should override actor options.

[Bogdanp]

Thanks! Can you fix the lint issue when you have a moment? I'll go ahead and merge after.