Failing tests

[soispha]

Following test seem to fail, when run with the latest versions of all dependencies:

    "test_basic"
    "test_createdrop"
    "test_errors_and_messages"
    "test_flask_integration"
    "test_orm_stuff"
    "test_pendulum_for_time_types"
    "test_transaction_separation"

The issue seems to be caused by the same problems described in the migra issue.