gnu: rust-clap-lex: Add 0.3.0.

* gnu/packages/crates-io.scm (rust-clap-lex-0.3): New variable.
(rust-clap-lex-0.2): Inherit from it.

gnu/packages/crates-io.scm

@@ -10845,8 +10845,32 @@ for programs written with Clap.")
 with Clap to generate Fig completion scripts.")
     (license (list license:expat license:asl2.0))))
 
+(define-public rust-clap-lex-0.3
+  (package
+    (name "rust-clap-lex")
+    (version "0.3.0")
+    (source (origin
+              (method url-fetch)
+              (uri (crate-uri "clap_lex" version))
+              (file-name (string-append name "-" version ".tar.gz"))
+              (sha256
+               (base32
+                "1a4dzbnlxiamfsn0pnkhn7n9bdfjh66j9fxm6mmr7d227vvrhh8d"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs (("rust-os-str-bytes" ,rust-os-str-bytes-6))))
+    (home-page "https://github.com/clap-rs/clap/tree/master/clap_lex")
+    (synopsis "Command line parser for Clap")
+    (description
+     "This package provides a parser for command line options.  As opposed
+to a declarative parser, @code{rust-clap-lex} processes arguments as a
+stream of tokens.")
+    ;; The user can choose either license.
+    (license (list license:expat license:asl2.0))))
+
 (define-public rust-clap-lex-0.2
   (package
+    (inherit rust-clap-lex-0.3)
     (name "rust-clap-lex")
     (version "0.2.4")
     (source (origin
@@ -10858,14 +10882,7 @@ with Clap to generate Fig completion scripts.")
                 "1ib1a9v55ybnaws11l63az0jgz5xiy24jkdgsmyl7grcm3sz4l18"))))
     (build-system cargo-build-system)
     (arguments
-     (list #:cargo-inputs
-           `(("rust-os-str-bytes" ,rust-os-str-bytes-6))))
-    (home-page "https://github.com/clap-rs/clap/tree/master/clap_lex")
-    (synopsis "Command line parser for Clap")
-    (description
-     "This package provides a parser for command line options.  As opposed to a
-declarative parser, @code{rust-clap-lex} processes arguments as a stream of tokens.")
-    (license (list license:expat license:asl2.0))))
+     (list #:cargo-inputs `(("rust-os-str-bytes" ,rust-os-str-bytes-6))))))
 
 (define-public rust-clearscreen-1
   (package