Log Message:
raptor2: update to 2.0.16.

2023-03-01 Raptor2 Version 2.0.16 Released

   Fixes CVE-2017-18926 and CVE-2020-25713
   Multiple Appveyor Windows and CMake build fixes by 0u812. (Note: the
   resulting binaries and libraries were not tested on Windows)
   Turtle parser now reads input in chunks so can handle huge files. Patch
   by Sebastian Freundt
   Added a serializer for the mKR language. Patch by Richard H.
   McCullough.
   Rapper utility now counts triples using longs
   Several smaller portability fixes for OpenBSD and cross building