Avoid copying RGBFIX binary when testing it (#1933)

Don't allow invalid interpolations to occur (#1925)

Avoid repeatedly specifying bash as the command shell in CI (#1926)

Generate Bison output in CMake build tree (#1929)

Revert "Generate Bison output in CMake build tree"

Generate Bison output in CMake build tree

Note why we are not using a CMake list to pass Bison flags

Copy DLLs to appropriate dir for install-less Windows testing

Use CPack for Windows packaging

Remove the claim that only exported symbols appear in sym and map files

Add examples for using character literals instead of strings as numbers

Update libpng to 1.6.56 (#1922)

Use C++-sryle `static_cast`, not C-style explicit cast

Document why lib src cache is cross-OS

Switch release process to a lightweight runner