gnu: Add rust-integer-encoding-1.

* gnu/packages/crates-io.scm (rust-integer-encoding-1): New variable.

gnu/packages/crates-io.scm

@@ -21499,6 +21499,31 @@ data efficiently.")
 that works on WASM too.")
     (license license:bsd-3)))
 
+(define-public rust-integer-encoding-1
+  (package
+    (name "rust-integer-encoding")
+    (version "1.2.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "integer-encoding" version))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32 "1c032xhif5d6a8nc4cak60g5ylwd6p9569122m5hm67brx2l5yhb"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:skip-build? #t
+       #:cargo-inputs
+       (("rust-async-trait" ,rust-async-trait-0.1)
+        ("rust-futures-util" ,rust-futures-util-0.3)
+        ("rust-tokio" ,rust-tokio-0.2))))
+    (home-page "https://github.com/dermesser/integer-encoding-rs")
+    (synopsis "Encoding and decoding integers to and from bytestrings")
+    (description
+     "This crate provides encoding and decoding of integers to and from
+bytestring representations.")
+    (license license:expat)))
+
 (define-public rust-interpolate-name-0.2
   (package
     (name "rust-interpolate-name")