prior to this change it would error with
@dataclass
> class pushshift_config(uconfig.pushshift):
E AttributeError: type object 'test_config' has no attribute 'pushshift'
* initial pushshift/rexport merge implementation, using id for merging
* smarter module deprecation warning using regex
* add `RedditBase` from promnesia
* `import_source` helper for gracefully handing mixin data sources