gnu: python-nbxmpp: Update to 0.6.4.

* gnu/packages/messaging.scm (python-nbxmpp): Update to 0.6.4.

gnu/packages/messaging.scm

@@ -7,7 +7,7 @@
 ;;; Copyright © 2015 Efraim Flashner <efraim@flashner.co.il>
 ;;; Copyright © 2016, 2017 Nils Gillmann <ng0@n0.is>
 ;;; Copyright © 2016 Andy Patterson <ajpatter@uwaterloo.ca>
-;;; Copyright © 2016, 2017 Clément Lassieur <clement@lassieur.org>
+;;; Copyright © 2016, 2017, 2018 Clément Lassieur <clement@lassieur.org>
 ;;; Copyright © 2017 Mekeor Melire <mekeor.melire@gmail.com>
 ;;; Copyright © 2017 Arun Isaac <arunisaac@systemreboot.net>
 ;;; Copyright © 2017, 2018 Tobias Geerinckx-Rice <me@tobias.gr>
@@ -485,14 +485,14 @@ simultaneously and therefore appear under the same nickname on IRC.")
 (define-public python-nbxmpp
   (package
     (name "python-nbxmpp")
-    (version "0.6.1")
+    (version "0.6.4")
     (source
      (origin
        (method url-fetch)
        (uri (pypi-uri "nbxmpp" version))
        (sha256
         (base32
-         "0qvkiscy42nhzhccszi049ws8cnhpxgc13g8naq1rsa5x9zy163c"))))
+         "12rfmp613alh3mi8f94008sx7x1a8c1izs3icrvw7bf4gnf2pi31"))))
     (build-system python-build-system)
     (arguments
      `(#:tests? #f))                    ; no tests