Update flask_caching to 1.5.0

[pyup-bot]

This PR updates flask_caching from 1.4.0 to 1.5.0.

Changelog

1.5.0

- Add support for a Redis Sentinel Cluster.
PR `90 <https://github.com/sh4nks/flask-caching/pull/90>`_.
- Parameterize the hash function so alternatives can be used.
PR `77 <https://github.com/sh4nks/flask-caching/pull/77>`_.
- Include the deprecated ``werkzeug.contrib.cache`` module in Flask-Caching.
PR `75 <https://github.com/sh4nks/flask-caching/pull/75>`_.

Links

• PyPI: https://pypi.org/project/flask-caching
• Changelog: https://pyup.io/changelogs/flask-caching/
• Repo: https://github.com/sh4nks/flask-caching
• Docs: https://pythonhosted.org/Flask-Caching/

[pyup-bot]

Closing this in favor of #53