* logger_formatter -> log_format
* avoid touching global Sidekiq.logger in JobLogger
* rewrite tests for compactness and coverage
* hide banner in JSON
* Check Config File Existence (#4054)
* Check config file existence
* Eager config file check
* Parse expanded path to default sidekiq.yml config file in Rails app
* Cleanup
* Add minitest-around
* Extract context from formatter
* Add JSON logger formatter
* Adjust job logger to handle elapsed time within context
* Add tid test
* Rename processor logger
* Enforce global state reset in logging tests
* Add warning about upcoming refactoring to Sidekiq::Logging
* Replace around hook with explicit stub inside test
It's implemented with fibers, which means Thread.current returns different values in JRuby.
* Fix typo
* Concise JSON formatter keys
* Add logger_formatter option
* Shift context from array of strings to hash
Allows more flexibly format context in the different formatters.
* Adjust warning message regarding context type change
* Add "Formatter" suffix to classes
* Fix CLI specs
* Replace Sidekiq::Logging with Sidekiq::Logger
* Namespace logger formatters
* Remove rails 4 appraisal
* Rework job processing in light of Rails 5's Reloader, see #3221
* Ignore built gems
* Documentation, testing
* Add fallback for 'retry' value server-side, fixes#3234
* Fix job hash reporting in stats
* cleanup
* Add job for AJ testing
* Push jobs with invalid JSON immediately to Dead set, fixes#3296
* Break retry logic into global and local parts, fixes#3306
* fix heisentest
