gnu: python-dnspython: Update to 0.15.0.

* gnu/packages/python.scm (python-dnspython, python2-dnspython): Update
to 0.15.0.

gnu/packages/python.scm

@@ -9858,14 +9858,14 @@ until the object is actually required, and caches the result of said call.")
 (define-public python-dnspython
   (package
   (name "python-dnspython")
-  (version "1.14.0")
+  (version "1.15.0")
   (source (origin
             (method url-fetch)
             (uri (string-append "http://www.dnspython.org/kits/"
                                 version "/dnspython-" version ".tar.gz"))
             (sha256
              (base32
-              "1z472r63gdqsxhsxj3plr5vs478yf4303vrqxxpsccc940g441hl"))))
+              "0jr4v2pd90i6l1xxbss2m05psbjaxvyvvvpq44wycijpfgjqln8i"))))
   (build-system python-build-system)
   (arguments '(#:tests? #f)) ; XXX: requires internet access
   (native-inputs