gnu: Add rust-bit-vec-0.6.

* gnu/packages/crates-io.scm (rust-bit-vec-0.6): New variable.
(rust-bit-vec-0.5): Inherit from rust-bit-vec-0.6.

Signed-off-by: Efraim Flashner <efraim@flashner.co.il>

gnu/packages/crates-io.scm

@@ -4985,8 +4985,36 @@ types.")
        #:cargo-development-inputs
        (("rust-rand" ,rust-rand-0.3))))))
 
+(define-public rust-bit-vec-0.6
+  (package
+    (name "rust-bit-vec")
+    (version "0.6.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "bit-vec" version))
+        (file-name
+         (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1ywqjnv60cdh1slhz67psnp422md6jdliji6alq0gmly2xm9p7rl"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-serde" ,rust-serde-1))
+       #:cargo-development-inputs
+       (("rust-rand" ,rust-rand-0.7)
+        ("rust-rand-xorshift" ,rust-rand-xorshift-0.2)
+        ("rust-serde-json" ,rust-serde-json-1))))
+    (home-page "https://github.com/contain-rs/bit-vec")
+    (synopsis "Vector of bits")
+    (description
+     "This package provides a vector of bits.")
+    (license (list license:expat license:asl2.0))))
+
 (define-public rust-bit-vec-0.5
   (package
+    (inherit rust-bit-vec-0.6)
     (name "rust-bit-vec")
     (version "0.5.1")
     (source
@@ -4998,18 +5026,12 @@ types.")
        (sha256
         (base32
          "1fyh8221s6cxlmng01v8v2ljhavzawqqs8r1xjc66ap5sjavx6zm"))))
-    (build-system cargo-build-system)
     (arguments
      `(#:skip-build? #t
        #:cargo-inputs
        (("rust-serde" ,rust-serde-1))
        #:cargo-development-inputs
-       (("rust-serde-json" ,rust-serde-json-1))))
+       (("rust-serde-json" ,rust-serde-json-1))))))
-    (home-page "https://github.com/contain-rs/bit-vec")
-    (synopsis "Vector of bits")
-    (description
-     "This package provides a vector of bits.")
-    (license (list license:expat license:asl2.0))))
 
 (define-public rust-bit-vec-0.4
   (package