release 12.3.1

add doc about newcodegen

fixed cmp() sign/flags errors

preparing for 12.2 release

long for loop warning

update github build actions

threshold 2 on ptr usages before no longer const

version 12.2-BETA

version 12.1.1

Add PET 80 column support. (#211)

cleanup, animals example removed because it's superseded by the point…

…ers/animalgame example now