add missing open-source-parsers/jsoncpp to traits list

Author: prince-chrismc

docs/install.md

@@ -4,9 +4,7 @@ There's a number of options to choice from.
 
 ## Overview
 
-It's strongly recommended to use a package manager, as JWT-CPP has dependencies for both 
-cryptography and JSON libraries, having a tool to do the heavily lifting can be ideal.
-Examples of a C and C++ package manager are [Conan](https://conan.io/) and [vcpkg](https://vcpkg.io/). If the version is out of date please check with their respective communities before opening and issue here.
+It's strongly recommended to use a package manager, as JWT-CPP has dependencies for both cryptography and JSON libraries, having a tool to do the heavily lifting can be ideal. Examples of a C and C++ package manager are [Conan](https://conan.io/) and [vcpkg](https://vcpkg.io/). If the version is out of date please check with their respective communities before opening and issue here.
 
 When manually adding this dependency, and the dependencies this has, check the GitHub Actions and Workflows for some inspiration about how to go about it.
 

docs/traits.md

@@ -10,11 +10,13 @@ For your convenience there are serval traits implementation which provide some p
 [![nlohmann][nlohmann]](https://github.com/nlohmann/json)
 [![jsoncons][jsoncons]](https://github.com/danielaparker/jsoncons)
 [![boostjson][boostjson]](https://github.com/boostorg/json)
+[![jsoncpp][jsoncpp]](https://github.com/open-source-parsers/jsoncpp)
 
 [picojson]: https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/Thalhammer/jwt-cpp/badges/traits/kazuho-picojson/shields.json
 [nlohmann]: https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/Thalhammer/jwt-cpp/badges/traits/nlohmann-json/shields.json
 [jsoncons]: https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/Thalhammer/jwt-cpp/badges/traits/danielaparker-jsoncons/shields.json
 [boostjson]: https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/Thalhammer/jwt-cpp/badges/traits/boost-json/shields.json
+[jsoncpp]: https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/Thalhammer/jwt-cpp/badges/traits/open-source-parsers-jsoncpp/shields.json
 
 In order to maintain compatibility, [picojson](https://github.com/kazuho/picojson) is still used to provide a specialized `jwt::claim` along with all helpers. Defining `JWT_DISABLE_PICOJSON` will remove this optional dependency. It's possible to directly include the traits defaults for the other JSON libraries. See the [traits examples](https://github.com/Thalhammer/jwt-cpp/tree/master/example/traits) for details.