v5.5.5

Fix Atomic JobLock Key Setting

Similar to #283 which made the scheduler atomically get its lock, have the JobLock plugin atomically get its lock so that a crash doesn't cause the lock to be held forever.
Fixed by @jpulec via #285 and @evantahler via 1c5273c

Test with Circle CI

We now test all commits & PRs with Circle CI! See the results here: https://circleci.com/gh/taskrabbit/workflows/node-resque
Fixed by @evantahler via #289