PostMeta.php file model has a copy-paste Posts class inside in 0.1.0 version

I've installed package `0.1.0` and at the very beginning I found an issue 

PostMeta.php file model has a copy-paste Posts class inside

<img width="910" alt="image" src="https://user-images.githubusercontent.com/33632837/227046459-19f8b072-73a4-410a-a802-44b1676d5c5c.png">
