gnu: Add rust-base64-0.10.

* gnu/packages/crates-io.scm (rust-base64-0.10): New variable.

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

gnu/packages/crates-io.scm

@@ -279,6 +279,33 @@ support.")
     (license (list license:asl2.0
                    license:expat))))
 
+(define-public rust-base64-0.10
+  (package
+    (name "rust-base64")
+    (version "0.10.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "base64" version))
+       (file-name
+        (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "13k6bvd3n6dm7jqn9x918w65dd9xhx454bqphbnv0bkd6n9dj98b"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:skip-build? #t
+       #:cargo-inputs
+       (("rust-byteorder" ,rust-byteorder-1.3))
+       #:cargo-development-inputs
+       (("rust-criterion" ,rust-criterion-0.2)
+        ("rust-rand" ,rust-rand-0.4))))
+    (home-page "https://github.com/marshallpierce/rust-base64")
+    (synopsis "Encodes and decodes base64 as bytes or utf8")
+    (description
+     "Encodes and decodes base64 as bytes or utf8.")
+    (license (list license:expat license:asl2.0))))
+
 (define-public rust-base-x-0.2
   (package
     (name "rust-base-x")