Bump flask-caching from 1.4.0 to 1.8.0
Bump flask-caching from 1.4.0 to 1.8.0

Bumps [flask-caching](https://github.com/sh4nks/flask-caching) from 1.4.0 to 1.8.0.
- [Release notes](https://github.com/sh4nks/flask-caching/releases)
- [Changelog](https://github.com/sh4nks/flask-caching/blob/master/CHANGES)
- [Commits](https://github.com/sh4nks/flask-caching/compare/v1.4.0...v1.8.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
BMeu/Orchard,BMeu/Orchard