import bottle_pgsql: Multiple exception types must be parenthesized

Using python 3.10.4

```
import bottle_pgsql

File ~/Projects/samgt/.direnv/python-3.10.4/lib/python3.10/site-packages/bottle_pgsql.py:95
    except HTTPResponse, e:
           ^
SyntaxError: multiple exception types must be parenthesized
```