Log message:
ruby-gnome: Update to 3.4.0.

Upstream changes (from NEWS):

== Ruby-GNOME 3.4.0: 2019-10-10

This is a bug fix release of 3.3.9.

=== Changes

==== Ruby/ATK

  * Fixes

    * Fixed a typo.
      [GitHub#1302][Reported by kojix2]

=== Thanks

  * kojix2

== Ruby-GNOME 3.3.9: 2019-10-10

This is a full GLib 2.62.0 support release.

=== Changes

==== Ruby/GLib2

  * Improvements

    * Deprecated (({GLib::Param::PRIVATE})). Use
      (({GLib::Param::STATIC_NAME})) instead.

    * Deprecated (({GLib::Param#private?})). Use
      (({GLib::Param#static_name?})) instead.

    * Added new flags:

      * (({GLib::Param::STATIC_NICK}))

      * (({GLib::Param::STATIC_BLURB}))

      * (({GLib::Param::EXPLICIT_NOTIFY}))

      * (({GLib::Param::DEPRECATED}))

    * Added new predicates:

      * (({GLib::Param#static_nick?}))

      * (({GLib::Param#static_blurb?}))

      * (({GLib::Param#explicit_notify?}))

      * (({GLib::Param#deprecated?}))

    * Deprecated (({ruby_gnome2_version})) in `mkmf-gnome`. Use
      (({ruby_gnome_version})) instead.

    * Added (({rbgobj_gtype_from_ruby()})).

    * Added (({rbg_is_object()})).

    * Added (({rbg_is_value()})).

    * Added (({rbg_is_bytes()})).

    * Removed needless const from the return value of
      (({rbg_rval2strv()})).

    * Removed needless const from the return value of
      (({rbg_rval2strv_accept_nil()})).

    * Added (({rbg_rval2filenamev()})).

    * Added (({rbg_rval2filenamev_accept_nil()})).

    * Stopped to define (({GType})) for (({GPollFD})).

==== Ruby/GObjectIntrospection

  * Improvements

    * Added support for conversion from (({GLib::Bytes})) to
      (({[gint8]})) and (({[guint8]})).

    * Added more information to inspected result.

==== Ruby/GIO2

  * Improvements

    * Added support for GLib 2.62.0 or later.
      [GitHub#1296][Reported by Mamoru TASAKA]

==== Ruby/GTK3

  * Improvements

    * Added (({Gtk::TreeModelSort.new})).
      [GitHub#1298][Reported by LutzLue]
      (({[gint8]})) and (({[guint8]})).

==== Ruby/GStreamer

  * Improvements

    * Removed all custom callbacks.

    * (({Gst::TagList#each})): Changed to yield tag name and tag
      values.

=== Thanks

  * LutzLue

  * Mamoru TASAKA