I may wait a few days for all the build problems with gcc 8 and there are still several packages that haven't been properly rebuilt against boost 1.66, but I plan to build yaml-cpp 0.6.0 and rebuild its dependencies in the near future:

$ repoquery --repoid=rawhide --source --whatrequires "libyaml-cpp.so.0.5()(64bit)"
Last metadata expiration check: 0:01:30 ago on Sun 11 Feb 2018 01:21:13 PM CST.
OpenColorIO-1.1.0-1.fc28.src.rpm
calamares-3.1.8-6.fc28.src.rpm
facter-3.9.3-1.fc28.src.rpm
fawkes-1.0.1-13.fc28.src.rpm
librime-1.2-19.fc28.src.rpm
mongodb-3.6.2-1.fc28.src.rpm
pdns-4.1.0-2.fc28.src.rpm

Thanks,
Richard
FAS: hobbes1069