fix(ModelsCommand): use 'string' as realType for 'encrypted' casts

[pataar]

Summary

Laravel casts using 'encrypted' always result in a string. This is because Laravel encrypts the value directly without serialization. As a result, the output will never be anything other than a string.

Ref in HasAttributes.php:

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• Misc. change (internal, infrastructure, maintenance, etc.)

Checklist

• Existing tests have been adapted and/or new tests have been added
• Update the README.md
• Code style has been fixed via composer fix-style

[pataar]

I tested this locally using the following test:

(email is encrypted)