introduce database cleaner monkeypatch

Author: alagram

spec/spec_helper.rb

@@ -100,3 +100,4 @@ def sqlite?
 require_relative 'support/helpers'
 require_relative 'support/exceed_query_limit'
 require_relative 'support/query_counter'
+require_relative 'support/database_cleaner_monkeypatch'

spec/support/database_cleaner_monkeypatch.rb

@@ -0,0 +1,13 @@
+module DatabaseCleaner
+  module ActiveRecord
+    class Base < DatabaseCleaner::Strategy
+      def self.migration_table_name
+        if Gem::Version.new("6.0.0") <= ::ActiveRecord.version
+          ::ActiveRecord::Base.connection.schema_migration.table_name
+        else
+          ::ActiveRecord::SchemaMigration.table_name
+        end
+      end
+    end
+  end
+end