Log Message:
ruby-gnome2: update to 3.3.6.

Upstream changes:

== Ruby-GNOME2 3.3.6: 2019-03-21

This is a follow-up release of 3.3.5.

=== Changes

==== Ruby/GIO2

  * Improvements

    * (({Gio::File#read})): Added support for block.

    * (({Gio::File.open})): Added support for (({Pathname})).

    * (({Gio::InputStream.open})): Added support for block.

==== Ruby/CairoGObject

  * Fixes

    * Fixed a bug that old cairo may be used.

==== Ruby/GObjectIntrospection

  * Fixes

    * Fixed a bug that 64bit integer conversion may be failed for
      large integer.

    * Fixed typos.