Get json library version information
Examples
version()
#> [1] "{\"compiler\":{\"c++\":\"201103\",\"family\":\"gcc\",\"version\":\"11.4.0\"},\"copyright\":\"(C) 2013-2017 Niels Lohmann\",\"name\":\"JSON for Modern C++\",\"platform\":\"linux\",\"url\":\"https://github.com/nlohmann/json\",\"version\":{\"major\":3,\"minor\":7,\"patch\":3,\"string\":\"3.7.3\"}}"