add json-build

Author: lcsmuller

README.md

@@ -589,6 +589,7 @@ A curated list of awesome C++ (or C) frameworks, libraries, resources, and shiny
 * [json](https://github.com/nlohmann/json) :zap: - JSON for Modern C++. [MIT]
 * [JSON++](https://github.com/hjiang/jsonxx) - A JSON parser in C++. [MIT]
 * [json.h](https://github.com/sheredom/json.h) - A simple one header/one source solution to parsing JSON in C and C++. [Unlicense]
+* [json-build](https://github.com/lcsmuller/json-build) - C89 tiny zero-allocation JSON serializer. [MIT]
 * [json-c](https://github.com/json-c/json-c) - A JSON implementation in C. [MIT]
 * [jsoncons](https://github.com/danielaparker/jsoncons) - A C++ header-only library for JSON and JSON-like binary formats with JSONPointer, JSONPatch, JSONPath and JMESPath. [Boost]
 * [JsonCpp](https://github.com/open-source-parsers/jsoncpp) - A C++ library for interacting with JSON. [MIT]
@@ -964,7 +965,6 @@ A curated list of awesome C++ (or C) frameworks, libraries, resources, and shiny
 * [American fuzzy lop](http://lcamtuf.coredump.cx/afl/) a.k.a. afl-fuzz - Crazy fuzzing tool that automatically discovers bugs given time and minimal example input. [Apache2]
 * [Better String](http://bstring.sourceforge.net) - An alternative to the string library for C which is more functional and does not have buffer overflow overrun problems. Also includes a C++ wrapper. [BSD, GPL2]
 * [Boost.Signals](http://www.boost.org/doc/libs/1_56_0/doc/html/signals.html) - An implementation of a managed signals and slots system. [Boost]
-* [Concord](https://github.com/Cogmasters/concord) - A Discord API wrapper library written in C. [MIT] [website](https://cogmasters.github.io/concord)
 * [CPPItertools](https://github.com/ryanhaining/cppitertools) - Range-based for loop add-ons inspired by the Python builtins and itertools library. [BSD-2-Clause]
 * [DynaMix](https://github.com/iboB/dynamix) - A library which allows you to compose and modify objects at run time. [MIT]
 * [{fmt}](https://github.com/fmtlib/fmt) :zap: - Small, safe and fast formatting library for C++. [Simplified BSD]