gnu: Add rust-clap-lex-0.2.

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

Signed-off-by: Tobias Geerinckx-Rice <me@tobias.gr>

gnu/packages/crates-io.scm

@@ -10621,6 +10621,27 @@ (define-public rust-clap-2
         ("rust-version-sync" ,rust-version-sync-0.8))))
     (license license:expat)))
 
+(define-public rust-clap-lex-0.2
+  (package
+    (name "rust-clap-lex")
+    (version "0.2.4")
+    (source (origin
+              (method url-fetch)
+              (uri (crate-uri "clap-lex" version))
+              (file-name (string-append name "-" version ".tar.gz"))
+              (sha256
+               (base32
+                "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.")
+    (license (list license:expat license:asl2.0))))
+
 (define-public rust-clearscreen-1
   (package
     (name "rust-clearscreen")