gnu: python-idna: Update to 2.7.

* gnu/packages/python.scm (python-idna): Update to 2.7.

gnu/packages/python.scm

@@ -6322,14 +6322,14 @@ versions of Python.")
 (define-public python-idna
   (package
     (name "python-idna")
-    (version "2.6")
+    (version "2.7")
     (source
      (origin
        (method url-fetch)
        (uri (pypi-uri "idna" version))
        (sha256
         (base32
-         "13qaab6d0s15gknz8v3zbcfmbj6v86hn9pjxgkdf62ch13imssic"))))
+         "05jam7d31767dr12x0rbvvs8lxnpb1mhdb2zdlfxgh83z6k3hjk8"))))
     (build-system python-build-system)
     (home-page "https://github.com/kjd/idna")
     (synopsis "Internationalized domain names in applications")