gnu: jack-2: Update to 1.9.13.

* gnu/packages/audio.scm (jack-2): Update to 1.9.13.
[arguments]: Don't build with python-2.
[inputs]: Replace python2-dbus with python-dbus.

gnu/packages/audio.scm

@@ -1532,7 +1532,7 @@ synchronous execution of all clients, and low latency operation.")
 (define-public jack-2
   (package (inherit jack-1)
     (name "jack2")
-    (version "1.9.12")
+    (version "1.9.13")
     (source (origin
              (method url-fetch)
              (uri (string-append "https://github.com/jackaudio/jack2/releases/"
@@ -1541,17 +1541,15 @@ synchronous execution of all clients, and low latency operation.")
              (file-name (string-append name "-" version ".tar.gz"))
              (sha256
               (base32
-               "0crf4y9a5j9miw8r5ji4l3w5w0y2frrf7xyfsfdgacnw6vwy5vyy"))))
+               "1d1d403jn4366mqig6g8ghr8057b3rn7gs26b5p3rkal34j20qw2"))))
     (build-system waf-build-system)
     (arguments
-     `(#:python ,python-2
-       #:tests? #f  ; no check target
+     `(#:tests? #f  ; no check target
        #:configure-flags '("--dbus"
                            "--alsa")
        #:phases
        (modify-phases %standard-phases
-         (add-before
-          'configure 'set-linkflags
+         (add-before 'configure 'set-linkflags
            (lambda _
              ;; Add $libdir to the RUNPATH of all the binaries.
              (substitute* "wscript"
@@ -1574,7 +1572,7 @@ synchronous execution of all clients, and low latency operation.")
        ("expat" ,expat)
        ("libsamplerate" ,libsamplerate)
        ("opus" ,opus)
-       ("python2-dbus" ,python2-dbus)
+       ("python-dbus" ,python-dbus)
        ("readline" ,readline)))
     (native-inputs
      `(("pkg-config" ,pkg-config)))