0.2.21, explicit select_for_update method

0.2.20, use pydantic to ensure types of config json

0.2.19, select for udpate skip locked, fix async tests

0.2.18, changed sys.version compararion

0.2.17, get_iter and get_iter_as

0.2.16, set default max_size to 10

0.2.15, import find_pool

0.2.14, async get_conn

0.2.13; name of default db, other minor fixes

0.2.12, more conv functions