Bump xiaomi_miio dependency

[rytilahti]

Proposed change

Bump python-miio dependency to the new version, changelog available at https://github.com/rytilahti/python-miio/releases/tag/0.5.9

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Hey there @syssi, @starkillerOG, @bieniu, mind taking a look at this pull request as it has been labeled with an integration (xiaomi_miio) you are listed as a code owner for? Thanks!
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[rytilahti]

Looks like tzlocal (or something else?) started to suddenly fail on python3.8, created issue at Squachen/micloud#5

[MartinHjelmare]

Thanks!

[MartinHjelmare]

The time zone system error problem in Python 3.8 seems to only occur in our CI tests for Python 3.8. Local tests can't reproduce. Weird one.

We can probably merge here since that problem is unrelated and this PR didn't introduce it.

[frenck]

Agreed, lets merge it an see what happens.
Python 3.8 is close to being removed from the tests anyways.

[frenck]

Thanks, @rytilahti 👍