* use std::to_chars for doubles
* fixed cmake errors when an escript error occurs
* macos 13 with clang15
* CI: macos new cache version
* guessing game
* guess no2
* test shipped clang with deloytarget env
* adapted testdata, lets see if all platforms behave the same
* explicit test if high precision double can get packed+unpacked
* log testclient receive buffer on error
* added docs
