gnu: Add erlang-jsx.

* gnu/packages/erlang.scm (erlang-jsx): New variable.

Signed-off-by: Christopher Baines <mail@cbaines.net>

gnu/packages/erlang.scm

@@ -7,6 +7,7 @@
 ;;; Copyright © 2020-2022 Hartmut Goebel <h.goebel@crazy-compilers.com>
 ;;; Copyright © 2021 Oskar Köök <oskar@maatriks.ee>
 ;;; Copyright © 2021 Cees de Groot <cg@evrl.com>
+;;; Copyright © 2022 jgart <jgart@dismail.de>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -499,6 +500,23 @@ Erlang's type language, and can also be used for the model-based random
 testing of stateful systems.")
     (license license:gpl3+)))
 
+(define-public erlang-jsx
+  (package
+    (name "erlang-jsx")
+    (version "3.1.0")
+    (source (origin
+              (method url-fetch)
+              (uri (hexpm-uri "jsx" version))
+              (sha256
+               (base32
+                "1wr7jkxm6nlgvd52xhniav64xr9rml2ngb35rwjwqlqvq7ywhp0c"))))
+    (build-system rebar-build-system)
+    (synopsis "Streaming, evented JSON parsing toolkit")
+    (description
+     "An Erlang application for consuming, producing and manipulating json.")
+    (home-page "https://github.com/talentdeficit/jsx")
+    (license license:expat)))
+
 (define-public erlang-providers
   (package
     (name "erlang-providers")