…se the filtering was comparing strings to symbols.
The original issue #42 doesn't specifically states whether the problem happens by using the rake task or CLI, but while the CLI is fixed by later changes, the rake task is still broken. It tries to compare model names that comes in an array of symbols via `options.only`/`options.exclude` against String model names. This keeps both CLIs (rake and binary) consistent in handling comma-separated values. The binary CLI splits into an array of strings, which the rake task should too.