Update sqlalchemy to 1.2.13

[pyup-bot]

This PR updates SQLAlchemy from 1.2.12 to 1.2.13.

Changelog

1.2.13

:released: October 31, 2018

 .. change::
    :tags: bug, postgresql
    :tickets: 4337

    Added support for the :class:`.aggregate_order_by` function to receive
    multiple ORDER BY elements, previously only a single element was accepted.


 .. change::
    :tags: bug, mysql
    :tickets: 4348

    Added word ``function`` to the list of reserved words for MySQL, which is
    now a keyword in MySQL 8.0

 .. change::
     :tags: feature, sql
     :versions: 1.3.0b1

     Refactored :class:`.SQLCompiler` to expose a
     :meth:`.SQLCompiler.group_by_clause` method similar to the
     :meth:`.SQLCompiler.order_by_clause` and :meth:`.SQLCompiler.limit_clause`
     methods, which can be overridden by dialects to customize how GROUP BY
     renders.  Pull request courtesy Samuel Chou.

 .. change::
    :tags: bug, misc

    Fixed issue where part of the utility language helper internals was passing
    the wrong kind of argument to the Python ``__import__`` builtin as the list
    of modules to be imported.  The issue produced no symptoms within the core
    library but could cause issues with external applications that redefine the
    ``__import__`` builtin or otherwise instrument it. Pull request courtesy Joe
    Urciuoli.

 .. change::
    :tags: bug, orm
    :tickets: 4349

    Fixed bug where "dynamic" loader needs to explicitly set the "secondary"
    table in the FROM clause of the query, to suit the case where the secondary
    is a join object that is otherwise not pulled into the query from its
    columns alone.


 .. change::
    :tags: bug, orm, declarative
    :tickets: 4350

    Fixed regression caused by :ticket:`4326` in version 1.2.12 where using
    :class:`.declared_attr` with a mixin in conjunction with
    :func:`.orm.synonym` would fail to map the synonym properly to an inherited
    subclass.

 .. change::
    :tags: bug, misc, py3k
    :tickets: 4339

    Fixed additional warnings generated by Python 3.7 due to changes in the
    organization of the Python ``collections`` and ``collections.abc`` packages.
    Previous ``collections`` warnings were fixed in version 1.2.11. Pull request
    courtesy xtreak.

 .. change::
    :tags: bug, ext

    Added missing ``.index()`` method to list-based association collections
    in the association proxy extension.

 .. change::
    :tags: bug, mysql
    :tickets: 4344

    Added a workaround for a MySQL bug 88718 introduced in the 8.0 series,
    where the reflection of a foreign key constraint is not reporting the
    correct case sensitivity for the referred column, leading to errors during
    use of the reflected constraint such as when using the automap extension.
    The workaround emits an additional query to the information_schema tables in
    order to retrieve the correct case sensitive name.

 .. change::
    :tags: bug, sql
    :tickets: 4341

    Fixed bug where the :paramref:`.Enum.create_constraint` flag on  the
    :class:`.Enum` datatype would not be propagated to copies of the type, which
    affects use cases such as declarative mixins and abstract bases.

 .. change::
    :tags: bug, orm, declarative
    :tickets: 4352

    The column conflict resolution technique discussed at
    :ref:`declarative_column_conflicts` is now functional for a :class:`.Column`
    that is also a primary key column.  Previously, a check for primary key
    columns declared on a single-inheritance subclass would occur before the
    column copy were allowed to pass.


.. changelog::

Links

• PyPI: https://pypi.org/project/sqlalchemy
• Changelog: https://pyup.io/changelogs/sqlalchemy/
• Homepage: http://www.sqlalchemy.org

[coveralls]

Pull Request Test Coverage Report for Build 1318

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 98.308%

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Totals
Change from base Build 1309:	0.0%
Covered Lines:	4008
Relevant Lines:	4077

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💛 - Coveralls