resque
Use non-deprecated form of Redis.sadd/srem
This fixes the deprecation warnings for Redis#sadd and Redis#srem output by version 4.8 of redis-rb, following the example of the changes made to Resque in https://github.com/resque/resque/pull/1827
Other tests failed when upgrading redis-rb to 5.0.4, which is why I added the restriction to resque-scheduler.gemspec
To avoid future regressions, I enabled Redis.raise_deprecations = true so that the test suite is more likely to catch future Redis deprecations.
Looks like your test matrix pairs Redis 4.8 with older versions of the resque gem, which trigger deprecation failures. Would you rather change the test matrix, or remove Redis.raise_deprecations = true?
@PatrickTulskie removed the gemspec change here too, because the main branch fixed Redis 5.0 compatibility :-)
Friendly bump. Is there anything preventing this from getting merged?
