Since [1] (release 1.11.0), the Alembic operations "now enforce
keyword-only arguments as passed as keyword and not positionally"
(from the commit message).
This change is compatible with the previous versions (as confirmed
in the CI).
[1]df75e85489
Closes-Bug: #2019948
Change-Id: I71f59da65edc163aa5891cf0b0d9768d2538b7a7