bumped version to 3.3.12
MODIFY
RELEASE_NOTES.rdoc
RELEASE_NOTES.rdoc
= Release Notes
+== Version 3.3.12
+* Support queue level declaration of dead letter queue message TTL.
+
== Version 3.3.11
* Fixed that dead lettering only works correctly with global config option.

MODIFY
lib/beetle/version.rb
lib/beetle/version.rb
module Beetle
- VERSION = "3.3.11"
+ VERSION = "3.3.12"
end

bumped version to 3.3.12