gnu: Add rust-number-prefix-0.4.

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

gnu/packages/crates-io.scm

@@ -39570,6 +39570,25 @@ mathematics.")
      `(#:cargo-inputs
        (("rust-num-traits" , rust-num-traits-0.2))))))
 
+(define-public rust-number-prefix-0.4
+  (package
+    (name "rust-number-prefix")
+    (version "0.4.0")
+    (source (origin
+              (method url-fetch)
+              (uri (crate-uri "number_prefix" version))
+              (file-name (string-append name "-" version ".tar.gz"))
+              (sha256
+               (base32
+                "1wvh13wvlajqxkb1filsfzbrnq0vrmrw298v2j3sy82z1rm282w3"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/ogham/rust-number-prefix")
+    (synopsis "Format numeric prefixes: kilo, giga, kibi")
+    (description
+     "This package provides a library for formatting numeric prefixes: kilo,
+giga, kibi.")
+    (license license:expat)))
+
 (define-public rust-number-prefix-0.3
   (package
     (name "rust-number-prefix")