Fix button typing

[drc38]

No description provided.

[github-actions]

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[lgtm-com]

This pull request introduces 1 alert when merging 0a45a58 into 51000b4 - view on LGTM.com

new alerts:

• 1 for Unused import

[drc38]

@lbbrhzn looks like main issue was the tests.yaml python version. Is there any reason not to bump?

[lbbrhzn]

I guess we should use the same version as home assistant.

[drc38]

I guess we should use the same version as home assistant.

My HA info says Python 3.9.7 but the sensor entity uses the same typing notation here whereas the typing documentation says | was introduced at 3.10... I'm confused 😕

[drc38]

So looks like we're missing this import:
from __future__ import annotations
As discussed here