Update mypy-dev to 1.16.0a1

[cdce8p]

Proposed change

https://github.com/cdce8p/mypy-dev/releases/tag/1.15.0a2
https://github.com/cdce8p/mypy-dev/releases/tag/1.16.0a1
Compare: python/mypy@5e119d0...1eb9d4c

• Typeshed updates
• Misc bugfixes
• Added support for properties with different getter and setter types

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• This PR fixes or closes issue: fixes #
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[home-assistant]

Hey there @icemanch, mind taking a look at this pull request as it has been labeled with an integration (flux_led) you are listed as a code owner for? Thanks!

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[andrewsayre]

Is this related to the dependency bump?

[cdce8p]

The upstream library expects a not None object for the discovery setter. Even though it internally handles None as well.

Opened lightinglibs/flux_led#405 upstream to correct that.