gnu: datamash: Update to 1.5.

* gnu/packages/datamash.scm (datamash): Update to 1.5.

gnu/packages/datamash.scm

 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2014, 2018 Eric Bavier <bavier@member.fsf.org>
-;;; Copyright © 2016, 2017, 2018 Efraim Flashner <efraim@flashner.co.il>
+;;; Copyright © 2016, 2017, 2018, 2019 Efraim Flashner <efraim@flashner.co.il>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -29,7 +29,7 @@ (define-module (gnu packages datamash)
 (define-public datamash
   (package
     (name "datamash")
-    (version "1.4")
+    (version "1.5")
     (source
      (origin
       (method url-fetch)
@@ -37,7 +37,7 @@ (define-public datamash
                           version ".tar.gz"))
       (sha256
        (base32
-        "0aj7wvv14s2fsf2rl49mqhxdagy8cbz6rz4xyi7bkg2nahnxsi7s"))))
+        "1b91pbdarnfmbhid8aa2f50k0fln8n7pg62782b4y0jlzvaljqi2"))))
     (native-inputs
      `(("which" ,which)                 ;for tests
        ("perl" ,perl)))                 ;for help2man