- update to 1.13.0:
* Fixed issue where the ``alembic check`` command did not
function correctly with upgrade structures that have multiple,
top-level elements, as are generated from the "multi-env"
environment template.
* Updated logic introduced in :ticket:`151` to allow
``if_exists`` and ``if_not_exists`` on index operations also
on SQLAlchemy 1.4 series. Previously this feature was
mistakenly requiring the 2.0 series.
* Replaced ``python-dateutil`` with the standard library module
zoneinfo.
* Alembic 1.13 now supports Python 3.8 and above.
* Fixed autogenerate issue where ``create_table_comment()`` and
``drop_table_comment()`` rendering in a batch table modify
would include the "table" and "schema" arguments, which are
not accepted in batch as these are already part of the top
level block.
* Additional fixes to PostgreSQL expression index compare
feature. The compare now correctly accommodates casts and
differences in spacing.
* Added detection logic for operation clauses inside the
expression, skipping the compare of these expressions.
* To accommodate these changes the logic for the comparison of
the indexes and unique constraints was moved to the dialect
implementation, allowing greater flexibility.