Fix modes for LV600S Humidifier (Sourcery refactored)

Pull Request #136 refactored by Sourcery.

Since the original Pull Request was opened as a fork in a contributor's repository, we are unable to create a Pull Request branching from it.

To incorporate these changes, you can either:

Merge this Pull Request instead of the original, or
Ask your contributor to locally incorporate these commits and push them to the original Pull Request
Incorporate changes via command line
```
git fetch https://github.com/vlebourl/custom_vesync pull/136/head
git merge --ff-only FETCH_HEAD
git push
```

NOTE: As code is pushed to the original Pull Request, Sourcery will re-run and update (force-push) this Pull Request with new refactorings as necessary. If Sourcery finds no refactorings at any point, this Pull Request will be closed automatically.

See our documentation here.

Run Sourcery locally

Reduce the feedback loop during development by using the Sourcery editor plugin:

VS Code
PyCharm

Help us improve this pull request!

vlebourl / custom_vesync

Fix modes for LV600S Humidifier (Sourcery refactored) #137