gnu: Add rust-env-logger-0.5.

* gnu/packages/crates-io.scm (rust-env-logger-0.5): New variable.

gnu/packages/crates-io.scm

@@ -2965,6 +2965,28 @@ is configured via an environment variable.")
         ("rust-regex" ,rust-regex-1.1)
         ("rust-termcolor" ,rust-termcolor-1.0))))))
 
+(define-public rust-env-logger-0.5
+  (package
+    (inherit rust-env-logger-0.7)
+    (name "rust-env-logger")
+    (version "0.5.13")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "env-logger" version))
+        (file-name
+         (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "0f0c4i4c65jh8lci0afl5yg74ac0lbnpxcp81chj114zwg9a9c0m"))))
+    (arguments
+     `(#:cargo-inputs
+       (("rust-atty" ,rust-atty-0.2)
+        ("rust-humantime" ,rust-humantime-1.2)
+        ("rust-log" ,rust-log-0.4)
+        ("rust-regex" ,rust-regex-1.1)
+        ("rust-termcolor" ,rust-termcolor-1.0))))))
+
 (define-public rust-env-logger-0.4
   (package
     (inherit rust-env-logger-0.7)