change serialize syntax to better one

app/models/dunlop/user_filter.rb

@@ -2,7 +2,7 @@ module Dunlop
   class UserFilter < ApplicationRecord
     belongs_to :user
     if Rails.application.config.database_configuration[Rails.env]['adapter'] != 'postgesql' # postgesql uses jsonb
-      serialize :filters, JSONColumnCoder.new(Hash)
+      serialize :filters, coder: JSONColumnCoder.new(Hash)
     end
 
     before_save do

app/models/dunlop/user_model.rb

@@ -3,9 +3,9 @@ module Dunlop
     extend ActiveSupport::Concern
 
     included do
-      serialize :role_names, JSONColumnCoder.new(Array)
-      serialize :role_names_admin, JSONColumnCoder.new(Array)
-      serialize :settings_storage, JSONColumnCoder.new(Hash)
+      serialize :role_names, coder: JSONColumnCoder.new(Array)
+      serialize :role_names_admin, coder: JSONColumnCoder.new(Array)
+      serialize :settings_storage, coder: JSONColumnCoder.new(Hash)
       has_many :source_files, as: :creator
       has_many :user_filters, class_name: 'Dunlop::UserFilter'
     end