Changelog:
- Use backend native fetch_val() implementation when available (#132)
- Replace psycopg2-binary with psycopg2 (#204)
- Speed up PostgresConnection fetch() and iterate() (#193)
- Access asyncpg Record field by key on raw query (#207)
- Fix type hinting for sqlite backend (#227)
- Allow setting min_size and max_size in postgres DSN (#210)
- Add option pool_recycle in postgres DSN (#233)
- Fix SQLAlchemy DDL statements (#226)
- Make fetch_val call fetch_one for type conversion (#246)
- Allow extra transaction options (#242)
- Unquote username and password in DatabaseURL (#248)