gnu: Add rust-serdeconv-0.4.

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

Signed-off-by: Nicolas Goaziou <mail@nicolasgoaziou.fr>

gnu/packages/crates-io.scm

@@ -31960,6 +31960,36 @@ for the serde framework.")
      "Unstable AST representation used by Serde codegen.")
     (license (list license:expat license:asl2.0))))
 
+(define-public rust-serdeconv-0.4
+  (package
+    (name "rust-serdeconv")
+    (version "0.4.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "serdeconv" version))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32 "0cal6qkzps92g7csycqij4ik1df3ccxn5sxnjvfvm473phnwbvbi"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:skip-build? #t
+       #:cargo-inputs
+       (("rust-rmp-serde" ,rust-rmp-serde-0.14)
+        ("rust-serde" ,rust-serde-1)
+        ("rust-serde-json" ,rust-serde-json-1)
+        ("rust-toml" ,rust-toml-0.5)
+        ("rust-trackable" ,rust-trackable-1))
+       #:cargo-development-inputs
+       (("rust-serde-derive" ,rust-serde-derive-1))))
+    (home-page "https://github.com/sile/serdeconv")
+    (synopsis
+     "Convert between TOML/JSON/MessagePack strings and serializable values")
+    (description
+     "This crate provides traits and functions for converting between
+TOML/JSON/MessagePack strings and serializable values.")
+    (license license:expat)))
+
 (define-public rust-serde-derive-1
   (package
     (name "rust-serde-derive")