gnu: Add rust-ron-0.4.

* gnu/packages/crates-io.scm (rust-ron-0.4): New variable.

Signed-off-by: Efraim Flashner <efraim@flashner.co.il>

gnu/packages/crates-io.scm

@@ -5979,6 +5979,35 @@ uses finite automata and guarantees linear time matching on all inputs.")
     (license (list license:asl2.0
                    license:expat))))
 
+(define-public rust-ron-0.4
+  (package
+    (name "rust-ron")
+    (version "0.4.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "ron" version))
+       (file-name
+        (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "1mrqdgw3w0yypg24jyq9mphp4zr9lr0ks7yam82m4n34x6njijyr"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:skip-build? #t
+       #:cargo-inputs
+       (("rust-base64" ,rust-base64-0.10)
+        ("rust-bitflags" ,rust-bitflags-1)
+        ("rust-serde" ,rust-serde-1.0))
+       #:cargo-development-inputs
+       (("rust-serde-bytes" ,rust-serde-bytes-0.11)
+        ("rust-serde-json" ,rust-serde-json-1.0))))
+    (home-page "https://github.com/ron-rs/ron")
+    (synopsis "Rusty Object Notation")
+    (description "Rusty Object Notation.")
+    (license (list license:asl2.0
+                   license:expat))))
+
 (define-public rust-rustc-demangle-0.1
   (package
     (name "rust-rustc-demangle")