v6.0.0

Added

• #blocklist and #safelist name argument (the first one) is now optional.
• Added support to subscribe only to specific event types via ActiveSupport::Notifications, e.g. subscribe to the
  throttle.rack_attack or the blocklist.rack_attack event.

Changed

• Changed ActiveSupport::Notifications event naming to comply with the recommneded format.

Deprecated

• Subscriptions via ActiveSupport::Notifications to the "rack.attack" event will continue to work (receive event
  notifications), but it is going to be removed in a future version. Replace the event name with /rack_attack/ to
  continue to be subscribed to all events, or "throttle.rack_attack" e.g. for specific type of events only.

Removed

• Removed support for ruby 2.2.
• Removed support for obsolete memcache-client as a cache store.
• Removed deprecated methods #blacklist and #whitelist (use #blocklist and #safelist instead).