- update to 1.11.1:
  * As Alembic 1.11.0 is considered a major release (Alembic does
    not use semver, nor does its parent project SQLAlchemy; 
    this has been `clarified <versioning_scheme>` in the documentation),
  * :ticket:`1130` modified calling signatures for most
    operations to consider all optional keyword parameters to
    be keyword-only arguments, to match what was always documented
    and generated by autogenerate. However, two of these
    changes were identified as possibly problematic without a
    more formal deprecation warning being emitted which were the
    ``table_name`` parameter to :meth:`.Operations.drop_index`,
    which was generated positionally by autogenerate prior to 
    version 0.6.3 released in 2014, and
    ``type_`` in :meth:`.Operations.drop_constraint` and
    :meth:`.BatchOperations.drop_constraint`, which was
    documented positionally in one example in the batch documentation.
  * Fixed typing use of :class:`~sqlalchemy.schema.Column` and
    other generic SQLAlchemy classes.
  * Restored the output type of :meth:`.Config.get_section` to
    include ``Dict[str, str]`` as a potential return type, which
    had been changed to immutable ``Mapping[str, str]``.
    When a section is returned and the default is not used,
    a mutable dictionary is returned.
  * Added placeholder classes for :class:`~.sqla.Computed` and
  * :class:`~.sqla.Identity` when older 1.x SQLAlchemy versions
    are in use, namely prior to SQLAlchemy 1.3.11 when the
    :class:`~.sqla.Computed` construct was introduced.
    Previously these were set to None, however this
    could cause issues with certain codepaths that were using
    ``isinstance()`` such as one within "batch mode".

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