* Move common flake8 options into config file
Currently --max-line-length being specified in two places. Just use the
existing value in the config file as the source of truth.
Move --count and --statistics to config file as well.
* Fix some lints
* modify zadd calls for redis-py 3.0
redis-py 3.0 changes the zadd interface that accepts a single
mapping argument that is expected to be a dict.
https://github.com/andymccurdy/redis-py#mset-msetnx-and-zadd
* change FailedQueue.push_job_id to always push a str
redis-py 3.0 does not attempt to cast values to str and is left
to the user.
* remove Redis connection patching
Since in redis-py 3.0, Redis == StrictRedis class, we no longer
need to patch _zadd and other methods.
Ref: https://github.com/rq/rq/pull/1016#issuecomment-441010847
This reverts commit 1ab8c19696 and
reintroduces all changes made by @dstufft.
Still, it needs more patches to reeanble the default log-to-console
behaviour. See #121.
Yang Yang