fix: allow hstore type to use transformers in driver postgres

[devx-opensource]

Description of change

The HSTORE type is the only type bypassing the transformer
column options.

This fix makes the option available to this column type as well.

If the current behavior was intentional then the documentation should be updated to inform developers that transformers are not applicable to the HSTORE type in Postgres.

Pull-Request Checklist

• Code is up-to-date with the master branch
• npm run format to apply prettier formatting
• npm run test passes with this change
• This pull request links relevant issues as Fixes #0000 N/A
• There are new or updated unit tests validating the change
• Documentation has been updated to reflect this change N/A
• The new commits follow conventions explained in CONTRIBUTING.md

[pleerock]

Thank you for contribution! 🎉