Having issues with sqlalchemy_utils JSONType while reading

I am using : https://github.com/kvesteri/sqlalchemy-utils

just so that I dont need to worry if I using Postgres in production or sqlite in dev environment .But from looks like it, I have no issues inserting data in json column, But when I read , seems like I get back a string, Wondering how to I get a python dict or json back when I read the column ?

```
from sqlalchemy_utils import JSONType
class Test(db.Model):
__tablename__ = 'test'
id = Column(Integer, primary_key=True)
json = Column(JSONType)
```

What I see

```
"json": "{\"data\": .....

```

Reproduce the reported Test model with sqlalchemy_utils.JSONType and compare the value returned when reading from SQLite and PostgreSQL. Trace the serialization and deserialization path used by the Graphene-SQLAlchemy integration; done means a JSON column read through this model returns a Python dict rather than a string.

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