New bali-phy version

[Benjamin Redelings]

Hi Rene,

Would it be possible to upload a new version of the bali-phy port that 
uses the recently-released version 4.0-beta2?  I'd like to get this out 
there because it can reduce memory usage by up to 20-fold in some cases.

    https://github.com/bredelings/BAli-Phy/releases/tag/4.0-beta2

I think the port update should be relatively straightforward.  It uses 
C++20 now, instead of just C++17.  I know it compiles under XCode 14, 
but I'm not sure about XCode 13.

-BenRI