gnu: rust-syn-1: Update to 1.0.99.

* gnu/packages/crates-io.scm (rust-syn-1): Update to 1.0.99.
[arguments]: Replace rust-unicode-xid with rust-unicode-ident.

gnu/packages/crates-io.scm

@@ -61381,21 +61381,22 @@ browsers.")
 (define-public rust-syn-1
   (package
     (name "rust-syn")
-    (version "1.0.82")
+    (version "1.0.99")
     (source
      (origin
        (method url-fetch)
        (uri (crate-uri "syn" version))
        (file-name (string-append name "-" version ".tar.gz"))
        (sha256
-        (base32 "0ncx7gg5mvd16q5xf77hgk09nwmfq0ppsn0vgc9x9jv0pg85vbwd"))))
+        (base32
+         "04xba78p559nl737llv7nqcwm723dp6ah5bbp0h5w1amqrpfznsq"))))
     (build-system cargo-build-system)
     (arguments
      `(#:skip-build? #t
        #:cargo-inputs
        (("rust-proc-macro2" ,rust-proc-macro2-1)
         ("rust-quote" ,rust-quote-1)
-        ("rust-unicode-xid" ,rust-unicode-xid-0.2))))
+        ("rust-unicode-ident" ,rust-unicode-ident-1))))
     (home-page "https://github.com/dtolnay/syn")
     (synopsis "Parser for Rust source code")
     (description