- update to 1.7.4:
* Fixed a regression that prevented the use of post write hooks on python
version lower than 3.9
* Added missing attributes from context stubs.
* Fixed issue where registration of custom ops was prone to failure due to
the registration process running exec() on generated code that as of the
1.7 series includes pep-484 annotations, which in the case of end user code
would result in name resolution errors when the exec occurs

- specfile:
* skip python 2 builds
* require importlib-resources
- update to version 1.7.1:
* Corrected "universal wheel" directive in setup.cfg so that
building a wheel does not target Python 2. The PyPi files index
for 1.7.0 was corrected manually. Pull request courtesy layday.
* Fixed issue in generated .pyi files where default values for
"Optional" arguments were missing, thereby causing mypy to
consider them as required.
* Fixed regression in batch mode due to :ticket:`883` where the
"auto" mode of batch would fail to accommodate any additional
migration directives beyond encountering an "add_column()"
directive, due to a mis-application of the conditional logic that
was added as part of this change, leading to "recreate" mode not
being used in cases where it is required for SQLite such as for
unique constraints.
- changes from version 1.7.0:
* Fixed regression due to :ticket:`803` where the ".info" and
".comment" attributes of "Table" would be lost inside of the
:class:`.DropTableOp` class, which when "reversed" into a