Bump macOS build baseline to Xcode 12.5 and macOS 11.0 [was: std::optional::value]

[Stephan Bergmann]

On 13/01/2022 16:53, Stephan Bergmann wrote:
> So as discussed at 
> <https://lists.freedesktop.org/archives/libreoffice/2022-January/088319.html> 
> "ESC meeting minutes: 2022-01-13", we will do the baseline bump to Xcode 
> 12.5 (and hence macOS 11.0) in early February, after the LO 7.3.0 release.

done now, 
<https://git.libreoffice.org/core/+/3469f6976c9435d1235315439e95beb9494bd8eb%5E%21> 
"Bump macOS build baseline to Xcode 12.5 and macOS 11.0"