Add follow, mute and block serializer

app/serializers/rest/admin/webhook_event_serializer.rb

@@ -9,6 +9,12 @@ class REST::Admin::WebhookEventSerializer < ActiveModel::Serializer
       REST::Admin::ReportSerializer
     when 'Status'
       REST::StatusSerializer
+    when 'Follow'
+      REST::FollowSerializer
+    when 'Mute'
+      REST::MuteSerializer
+    when 'Block'
+      REST::BlockSerializer
     else
       super
     end

app/serializers/rest/block_serializer.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class REST::BlockSerializer < ActiveModel::Serializer
+  attributes :id, :created_at, :updated_at, :account_id, :target_account_id, :uri
+
+  def id
+    object.id.to_s
+  end
+end

app/serializers/rest/follow_serializer.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+class REST::FollowSerializer < ActiveModel::Serializer
+  attributes :id, :created_at, :updated_at, :account_id,
+             :target_account_id, :show_reblogs, :uri,
+             :notify, :languages
+
+  def id
+    object.id.to_s
+  end
+end

app/serializers/rest/mute_serializer.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+class REST::MuteSerializer < ActiveModel::Serializer
+  attributes :id, :created_at, :updated_at, :hide_notifications,
+             :account_id, :target_account_id, :expires_at
+
+  def id
+    object.id.to_s
+  end
+end