gnu: Add rust-serial-test-2.

* gnu/packages/crates-io.scm (rust-serial-test-2): New variable.
(rust-serial-test-1): Inherit from rust-serial-test-2.

gnu/packages/crates-io.scm

@@ -61581,8 +61581,40 @@ for later processing.")
 for data that potentially contains secrets (e.g. cryptographic keys).")
     (license (list license:asl2.0 license:expat))))
 
+(define-public rust-serial-test-2
+  (package
+    (name "rust-serial-test")
+    (version "2.0.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "serial-test" version))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32 "0b9v0csv9wxl1gcjq99plwimxbmhgr6kzbwqyb457qh3d22xsmhf"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-dashmap" ,rust-dashmap-5)
+        ("rust-document-features" ,rust-document-features-0.2)
+        ("rust-fslock" ,rust-fslock-0.2)
+        ("rust-futures" ,rust-futures-0.3)
+        ("rust-lazy-static" ,rust-lazy-static-1)
+        ("rust-log" ,rust-log-0.4)
+        ("rust-parking-lot" ,rust-parking-lot-0.12)
+        ("rust-serial-test-derive" ,rust-serial-test-derive-2))
+       #:cargo-development-inputs
+       (("rust-itertools" ,rust-itertools-0.10)
+        ("rust-tokio" ,rust-tokio-1))))
+    (home-page "https://github.com/palfrey/serial_test")
+    (synopsis "Allows for the creation of serialised Rust tests")
+    (description
+     "This package allows for the creation of serialised Rust tests.")
+    (license license:expat)))
+
 (define-public rust-serial-test-1
   (package
+    (inherit rust-serial-test-2)
     (name "rust-serial-test")
     (version "1.0.0")
     (source
@@ -61592,7 +61624,6 @@ for data that potentially contains secrets (e.g. cryptographic keys).")
        (file-name (string-append name "-" version ".tar.gz"))
        (sha256
         (base32 "04864v5ain4nan2k5l32sr3bxpg0sfxxs2iki3xxcq78g9s3132k"))))
-    (build-system cargo-build-system)
     (arguments
      `(#:cargo-inputs
        (("rust-dashmap" ,rust-dashmap-5)
@@ -61605,12 +61636,7 @@ for data that potentially contains secrets (e.g. cryptographic keys).")
         ("rust-serial-test-derive" ,rust-serial-test-derive-1))
        #:cargo-development-inputs
        (("rust-itertools" ,rust-itertools-0.10)
-        ("rust-tokio" ,rust-tokio-1))))
-    (home-page "https://github.com/palfrey/serial_test")
-    (synopsis "Allows for the creation of serialised Rust tests")
-    (description
-     "This package allows for the creation of serialised Rust tests.")
-    (license license:expat)))
+        ("rust-tokio" ,rust-tokio-1))))))
 
 (define-public rust-serial-test-0.6
   (package