Bump sqlalchemy from 1.3.13 to 1.4.13

[dependabot-preview]

Bumps sqlalchemy from 1.3.13 to 1.4.13.

Release notes

Sourced from sqlalchemy's releases.

1.4.13

Released: May 3, 2021

orm

• [orm] [bug] [regression] Fixed regression in selectinload loader strategy that would cause it to cache its internal state incorrectly when handling relationships that join across more than one column, such as when using a composite foreign key. The invalid caching would then cause other unrelated loader operations to fail.

  References: #6410

• [orm] [bug] [regression] Fixed regression where _orm.Query.filter_by() would not work if the lead entity were a SQL function or other expression derived from the primary entity in question, rather than a simple entity or column of that entity. Additionally, improved the behavior of _sql.Select.filter_by() overall to work with column expressions even in a non-ORM context.

  References: #6414

• [orm] [bug] [regression] Fixed regression where using _orm.selectinload() and _orm.subqueryload() to load a two-level-deep path would lead to an attribute error.

  References: #6419

• [orm] [bug] [regression] Fixed regression where using the _orm.noload() loader strategy in conjunction with a "dynamic" relationship would lead to an attribute error as the noload strategy would attempt to apply itself to the dynamic loader.

  References: #6420

engine

• [engine] [bug] [regression] Restored a legacy transactional behavior that was inadvertently removed from the _engine.Connection as it was never tested as a known use case in previous versions, where calling upon the _engine.Connection.begin_nested() method, when no transaction is present, does not create a SAVEPOINT at all and instead starts an outer transaction, returning a RootTransaction object instead of a NestedTransaction object. This RootTransaction then will emit a real COMMIT on the database connection when committed. Previously, the 2.0 style behavior was present in all cases that would autobegin a transaction but not commit it, which is a behavioral change.

... (truncated)

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Superseded by #213.