Array doesn't seem to work

By looking at the base.py it seems Array is supported, however I got an error
> can't render element of type

# Steps to reproduce
1. create a table

```
CREATE TABLE default.xxx ( name String, phone Array(String)) ENGINE = Memory()
```
2.

```
#!/usr/bin/env python

# Test engine and table
from sqlalchemy import *
from sqlalchemy.engine import create_engine
from sqlalchemy.schema import *
from sqlalchemy_clickhouse.base import dialect
engine = create_engine('clickhouse://default:@localhost:8123/default')
tbl = Table('xxx', MetaData(bind=engine), autoload=True)

ddl = CreateTable(tbl).compile(dialect=dialect())
print(ddl)
```

Maybe my specific case -- print CREATE TABLE stmt isn't supported?