- json-c 0.13.1
* Add const size_t json_c_object_sizeof()
* Avoid invalid free (and thus a segfault) when ref_count gets < 0
* Fix handling of custom double formats that include a ".0"
* Avoid uninitialized variable warnings in json_object_object_foreach
* Add a top level fuzz directory for fuzzers run by OSS-Fuzz
* Fix build for certain uClibc based systems.
* Bump sonum to 4.0 to avoid conflicts because some packagers made
their own bump to ".so.3" for the older 0.12 release