Starscream dependency on zlib

[johndpope]

daltoniam/Starscream#844

this prevents xcframeworks being spat out
supabase/supabase-swift#38

[grdsdev]

Hi @johndpope

I decided to align the minimum supported platform of this library to the supabase-swift, that makes it possible to remove the starscream dependency, as you can check on #11

Does that solve your problem?