Subject: | S::T::Producer::YAML lose trigger 'scope' property |
according to the [DOC](http://search.cpan.org/~ilmari/SQL-Translator/lib/SQL/Translator/Schema/Trigger.pm#scope) trigger has `scope`, but it is [lost when generate YAML file](https://metacpan.org/source/ILMARI/SQL-Translator-0.11021/lib/SQL/Translator/Producer/YAML.pm#L143)