gnu: Add rust-serdect-0.2.

* gnu/packages/crates-io.scm (rust-serdect-0.2): New variable.

gnu/packages/crates-io.scm

@@ -56584,6 +56584,40 @@ for later processing.")
     (description "This package provides YAML support for Serde.")
     (license (list license:expat license:asl2.0))))
 
+(define-public rust-serdect-0.2
+  (package
+    (name "rust-serdect")
+    (version "0.2.0")
+    (source (origin
+              (method url-fetch)
+              (uri (crate-uri "serdect" version))
+              (file-name (string-append name "-" version ".tar.gz"))
+              (sha256
+               (base32
+                "0xw1b6acw6nd0jchzyxzr97f0s4shbcqh92iyjwln0cskshi8kx8"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-base16ct" ,rust-base16ct-0.2)
+        ("rust-serde" ,rust-serde-1)
+        ("rust-zeroize" ,rust-zeroize-1))
+       #:cargo-development-inputs
+       (("rust-bincode" ,rust-bincode-1)
+        ("rust-ciborium" ,rust-ciborium-0.2)
+        ("rust-hex-literal" ,rust-hex-literal-0.3)
+        ("rust-proptest" ,rust-proptest-1)
+        ("rust-serde" ,rust-serde-1)
+        ("rust-serde-json-core" ,rust-serde-json-core-0.5)
+        ("rust-serde-json" ,rust-serde-json-1)
+        ("rust-toml" ,rust-toml-0.7))))
+    (home-page "https://github.com/RustCrypto/formats/tree/master/serdect")
+    (synopsis
+     "Constant-time serde serializer/deserializer helpers")
+    (description
+     "This package provides constant-time serde serializer/deserializer helpers
+for data that potentially contains secrets (e.g. cryptographic keys).")
+    (license (list license:asl2.0 license:expat))))
+
 (define-public rust-serial-test-0.6
   (package
     (name "rust-serial-test")