ruby2_keyword removal step#3

Author: CharlesDelannoy

lib/safe-pg-migrations/plugins/statement_insurer/add_column.rb

@@ -3,10 +3,7 @@
 module SafePgMigrations
   module StatementInsurer
     module AddColumn
-      ruby2_keywords def add_column(table_name, column_name, type, *args)
-        options = args.last.is_a?(Hash) && args.last
-        options ||= {}
-
+      def add_column(table_name, column_name, type, **options)
         return super if should_keep_default_implementation?(**options)
 
         raise <<~ERROR unless backfill_column_default_safe?(table_name)