- Clean up the SPEC file

- update to 1.12.0
* Added new feature to the "code formatter" function which allows standalone
executable tools to be run against code, without going through the Python
interpreter. Known as the `exec` runner, it complements the existing
`console_scripts` runner by allowing non-Python tools such as `ruff` to
be used.
* Change the default value of `.EnvironmentContext.configure.compare_type` to `True`.
As Alembic's autogenerate for types was dramatically improved in
version 1.4 released in 2020, the type comparison feature is now much
more reliable so is now enabled by default.
* Fixed issue where the `ForeignKeyConstraint.match` parameter would not be
rendered in autogenerated migrations.
* Fixed issue where the `revision_environment` directive in `alembic.ini`
was ignored by the `alembic merge` command, leading to issues when other
configurational elements depend upon `env.py` being invoked within the
command.
* Added support for `op.drop_constraint()` to support PostgreSQL
`ExcludeConstraint` objects, as well as other constraint-like objects
that may be present in third party dialects, by resolving the `type_`
parameter to be `None` for this case. Autogenerate has also been
enhanced to exclude the `type_` parameter from rendering within this
command when `type_` is `None`.