Fix dark mode detection when using auto-switching for dark mode

[anderscarling]

No description provided.

[anderscarling]

Weirdly, my old code worked just as well as using the bestMatch api to check for appearance, even though I enabled "increased contrast" and maxed out the contrast slider in accessibility settings.

Tried a bit of googling but could not find any information about how to trigger .accessibilityHighContrastDarkAqua so I was not able to find a configuration where the old code broke.

However, I agree using bestMatch is definitely the way to go and seems to work in all scenarios I was able to reproduce.

[sindresorhus]

Tried a bit of googling but could not find any information about how to trigger .accessibilityHighContrastDarkAqua so I was not able to find a configuration where the old code broke.

I don't know either, but Apple explicitly said in a WWDC video at the time that bestMatch was the correct way to detect.