gnu: Add rust-time-0.3.

* gnu/packages/crates-io.scm (rust-time-0.3): New variable.
(rust-time-0.2): Inherit from above.

gnu/packages/crates-io.scm

@@ -55802,8 +55802,37 @@ fixed set of worker threads.")
 introspection APIs.")
     (license (list license:expat license:asl2.0))))
 
+(define-public rust-time-0.3
+  (package
+    (name "rust-time")
+    (version "0.3.5")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "time" version))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32 "1b943jf54q1667i328x3z73fsjdhcqdqccxckx1nzwwaz9ygxvs1"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:skip-build? #t
+       #:cargo-inputs
+       (("rust-itoa" ,rust-itoa-0.4)
+        ("rust-libc" ,rust-libc-0.2)
+        ("rust-quickcheck" ,rust-quickcheck-1)
+        ("rust-rand" ,rust-rand-0.8)
+        ("rust-serde" ,rust-serde-1)
+        ("rust-time-macros" ,rust-time-macros-0.2))))
+    (home-page "https://github.com/time-rs/time")
+    (synopsis "Date and time library")
+    (description "This package provides a date and time library.  It is fully
+interoperable with the standard library, and is mostly compatible with
+@code{#![no_std]}.")
+    (license (list license:expat license:asl2.0))))
+
 (define-public rust-time-0.2
   (package
+    (inherit rust-time-0.3)
     (name "rust-time")
     (version "0.2.23")
     (source
@@ -55813,7 +55842,6 @@ introspection APIs.")
        (file-name (string-append name "-" version ".tar.gz"))
        (sha256
         (base32 "12z95k0005rmyn9pf9v4hq80khsns7y5wfydnjr5jpci2yiyxnmw"))))
-    (build-system cargo-build-system)
     (arguments
      `(#:cargo-inputs
        (("rust-const-fn" ,rust-const-fn-0.4)
@@ -55828,13 +55856,7 @@ introspection APIs.")
        #:cargo-development-inputs
        (("rust-rand" ,rust-rand-0.7)
         ("rust-serde-json" ,rust-serde-json-1)
-        ("rust-standback" ,rust-standback-0.2))))
+        ("rust-standback" ,rust-standback-0.2))))))
-    (home-page "https://github.com/time-rs/time")
-    (synopsis "Date and time library")
-    (description "This package provides a date and time library.  It is fully
-interoperable with the standard library, and is mostly compatible with
-@code{#![no_std]}.")
-    (license (list license:expat license:asl2.0))))
 
 (define-public rust-time-0.1
   (package