AppVeyor: replace MSVC 2013 with 2019
AppVeyor: replace MSVC 2013 with 2019

thiagomacieira/tinycbor,thiagomacieira/tinycbor,intel/tinycbor,thiagomacieira/tinycbor,intel/tinycbor,thiagomacieira/tinycbor,01org/tinycbor,intel/tinycbor,intel/tinycbor,01org/tinycbor,01org/tinycbor