1.4 when we are using 1.9 I don't think it's a breaking change to requie this but it's worth noting.

It has been marked as Deprecated since 1.4 😁
So quite likely that the deprecated Reader gets dropped some time soon in an upcoming version of jsoncpp.
And also very likely that people that are using jsoncpp (in combination with jwt-cpp) will use a more recent version of jsoncpp. At least 1.4.

Who doesn't want to get rid of these deprecated messages. And when incorporating something new like jwt-cpp, getting these deprecated messages does not bring joy 😉