Merge pull request #1 from jonathandean/fix-generator-for-activerecor…

…d-7_1_2

Fix NoMethodError for ActiveRecord 7.1.2 in ShortenerGenerator

lib/generators/shortener/shortener_generator.rb

@@ -9,7 +9,7 @@ def self.source_root
   end
 
   def self.next_migration_number(dirname)
-    if ActiveRecord::Base.timestamped_migrations
+    if ActiveRecord.timestamped_migrations
       Time.new.utc.strftime("%Y%m%d%H%M%S")
     else
       "%.3d" % (current_migration_number(dirname) + 1)