Cannot use env variable on boolean property

[dragosv]

Mojito translation service plugin has a boolean property in the schema. When trying to use an env variable with it I get the following error

Exception occurred while processing configuration file: Data validation failed for plugin 'Serge::Sync::Plugin::TranslationService::mojito': '%ENV:ENV_VAR%' is not a valid boolean number

This is because subst_macros is applied after the validate_data in the base class.