gnu: Add rust-serde-value-0.6.

* gnu/packages/crates-io.scm (rust-serde-value-0.6): New variable.

gnu/packages/crates-io.scm

@@ -34762,6 +34762,30 @@ the application/x-www-form-urlencoded format.")
        #:cargo-development-inputs
        (("rust-serde-derive" ,rust-serde-derive-1))))))
 
+(define-public rust-serde-value-0.6
+  (package
+    (name "rust-serde-value")
+    (version "0.6.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "serde-value" version))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32 "1swh6870pr1cxr6ha769rv4wdnyfxdvsc42cmvf8lmla38lsfras"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:skip-build? #t
+       #:cargo-inputs
+       (("rust-ordered-float" ,rust-ordered-float-1)
+        ("rust-serde" ,rust-serde-1))))
+    (home-page "https://github.com/arcnmx/serde-value")
+    (synopsis "Serialization value trees")
+    (description
+     "@code{serde-value} provides a way to capture serialization value trees
+for later processing.")
+    (license license:expat)))
+
 (define-public rust-serde-yaml-0.8
   (package
     (name "rust-serde-yaml")