* 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
* Attempt to fix HerokuWorker test.
* Fixed test_shutdown_double_sigrtmin
* Another attempt to fix test
* Another attempt to fix test
* Another attempt to fix test
* When work horse runs into an exception, raise that exception before calling os._exit()
* Replaced async keyword with is_async in the Queue class to fix reserved keyword syntax errors in Python 3.7
* Updated tests to use is_async keyword when instantiating Queue objects
* Updated docs to reference is_async keyword for Queue objects
* Updated tox.ini, setup.py and .travis.yml with references to Python 3.7
* Define redis key prefix as class variable
Some prefixes were hardcoded in several places. This made it hard to
use custom prefixes via subclasses.
Resolves#920
* fixup! Define redis key prefix as class variable
* Initial take on delete_dependents
* Add tests including corner cases
* No need to canel dependents since they are not in a queue yet anyway
* The dependents keys can be deleted in all cases
* Update tests to included saved jobs in the deletion tests
* Correctly use pipeline in cancel method
* Unused connection
* Include dependents into dict format of job
* Add TODO
* Address comments from selwin
* Delete dependents key in redis if delete_dependents is called on its own
* Address recent comments from selwin
* Small change to trigger travis
* Remove TODO referring to canceled job state
* Remove dependent_ids from to_dict
* Address recent comments from selwin