Enable mypy checks for client.py

Author: damian3031

setup.cfg

@@ -19,5 +19,5 @@ ignore_missing_imports = true
 no_implicit_optional = true
 warn_unused_ignores = true
 
-[mypy-tests.*,trino.client,trino.sqlalchemy.*,trino.dbapi]
+[mypy-tests.*,trino.sqlalchemy.*]
 ignore_errors = true