Deprecated and removed features:

• None

New features

• json_patch: add first implementation only with patch application
• Add --disable-static and --disable-dynamic options to the cmake-configure script.
• Add -DBUILD_APPS=NO option to disable app build
• Minimum cmake version is now 3.9

Significant changes and bug fixes

• When serializing with JSON_C_TO_STRING_PRETTY set, keep the opening and
  closing curly or square braces on same line for empty objects or arrays.
• Disable locale handling when targeting a uClibc system due to problems
  with its duplocale() function.
• When parsing with JSON_TOKENER_STRICT set, integer overflow/underflow
  now result in a json_tokener_error_parse_number. Without that flag
  values are capped at INT64_MIN/UINT64_MAX.
• Fix memory leak with emtpy strings in json_object_set_string
• json_object_from_fd_ex: fail if file is too large (>=INT_MAX bytes)
• Add back json_number_chars, but only because it's part of the public API.
• Entirely drop mode bits from open(O_RDONLY) to avoid warnings on certain
  platforms.
• Specify dependent libraries, including -lbsd, in a more consistent way so
  linking against a static json-c works better
• Fix a variety of build problems and add & improve tests
• Update RFC reference to https://www.rfc-editor.org/rfc/rfc8259