* Add Slack::Announcer and SlackClient
* Add Slack::Messengers::Feedback class
* Use Slack::Messengers::Feedback and refactor test
* Should not raise an error if params are nil, let the job fail
* Add Slack::Messengers::Sponsorship
* Rename spec
* Use Slack::Messengers::Sponsorship
* Add Slack::Messengers::PotentialSpammer
* Use Slack::Messengers::PotentialSpammer
* Add Slack::Messengers::RateLimit and use it
* Refactor a bit and improve tests
* Add Slack::Messengers::Note and use it
* Use Slack::Announcer and fix spec
* Fix specs
* Update app/services/slack/announcer.rb
Co-Authored-By: Vaidehi Joshi <vaidehi.sj@gmail.com>
* Implement review suggestions
* Empty commit to trigger Travis
Co-authored-by: Vaidehi Joshi <vaidehi.sj@gmail.com>
