Error: `AttributeError: 'CrateDialect' object has no attribute 'default_isolation_level'. Did you mean: 'get_default_isolation_level'?`

## Problem
```python
engine = super().create_engine().execution_options(isolation_level="AUTOCOMMIT")
```

## Related?
- https://github.com/crate/sqlalchemy-cratedb/pull/217
