Update peewee to 3.5.1

[pyup-bot]

This PR updates peewee from 3.5.0 to 3.5.1.

Changelog

3.5.1

**New features**

* New documentation for working with [relationships](http://docs.peewee-orm.com/en/latest/peewee/relationships.html)
in Peewee.
* Improved tests and documentation for MySQL upsert functionality.
* Allow `database` parameter to be specified with `ModelSelect.get()` method.
For discussion, see 1620.
* Add `QualifiedNames` helper to peewee module exports.
* Add `temporary=` meta option to support temporary tables.
* Allow a `Database` object to be passed to constructor of `DataSet` helper.

**Bug fixes**

* Fixed edge-case where attempting to alias a field to it's underlying
column-name (when different), Peewee would not respect the alias and use the
field name instead. See 1625 for details and discussion.
* Raise a `ValueError` when joining and aliasing the join to a foreign-key's
`object_id_name` descriptor. Should prevent accidentally introducing O(n)
queries or silently ignoring data from a joined-instance.
* Fixed bug for MySQL when creating a foreign-key to a model which used the
`BigAutoField` for it's primary-key.
* Fixed bugs in the implementation of user-defined aggregates and extensions
with the APSW SQLite driver.
* Fixed regression introduced in 3.5.0 which ignored custom Model `__repr__()`.
* Fixed regression from 2.x in which inserting from a query using a `SQL()` was
no longer working. Refs 1645.

[View commits](https://github.com/coleifer/peewee/compare/3.5.0...3.5.1)

Links

• PyPI: https://pypi.org/project/peewee
• Changelog: https://pyup.io/changelogs/peewee/
• Repo: http://github.com/coleifer/peewee/