gnu: evince: Update to 3.20.0.

* gnu/packages/gnome.scm (evince): Update to 3.20.0.

gnu/packages/gnome.scm

@@ -410,7 +410,7 @@ forgotten when the session ends.")
 (define-public evince
   (package
     (name "evince")
-    (version "3.18.1")
+    (version "3.20.0")
     (source (origin
              (method url-fetch)
              (uri (string-append "mirror://gnome/sources/" name "/"
@@ -418,7 +418,7 @@ forgotten when the session ends.")
                                  name "-" version ".tar.xz"))
              (sha256
               (base32
-               "0cccmbvl1b6d2976642iyfr8g3r69zf3mzl2ln6vjvvdbrv26l3v"))))
+               "1052lm4i5qq27sgk6ck5xc1cxh0qx4zzhifjhmzjlv38afj5i0yg"))))
     (build-system glib-or-gtk-build-system)
     (arguments
      `(#:configure-flags '("--disable-nautilus")