Create .on_friendship_destroyed callback

README.md

@@ -165,6 +165,10 @@ end
 def on_friendship_blocked(friendship)
   ...
 end
+
+def on_friendship_destroyed(friendship)
+  ...
+end
 ```
 
 ## Roadmap

lib/has_friendship/friendable.rb

@@ -42,6 +42,7 @@ module InstanceMethods
         on_friendship_created
         on_friendship_accepted
         on_friendship_blocked
+        on_friendship_destroyed
       ).freeze
 
       CALLBACK_METHOD_NAMES.each do |method_name|

lib/has_friendship/friendship.rb

@@ -1,8 +1,12 @@
 module HasFriendship
   class Friendship < ActiveRecord::Base
 
-    after_create do
-      friend.on_friendship_created(self)
+    after_create do |record|
+      record.friend.on_friendship_created(record)
+    end
+
+    after_destroy do |record|
+      record.friend.on_friendship_destroyed(record)
     end
 
     enum status: { pending: 0, requested: 1, accepted: 2, blocked: 3 } do