Peewee returns Decimal(), unsupported type.
solved.
Querying data from RDS, and peewee get the record succesfully however, when I loop through to get the value, it returns Decimal(), or corresponding type. I used peewee in my last project, and it did not return data like this.

```
records = market.select().limit(1)
return [r.volume for r in records]

results:
[Decimal(89033)]
```