Some updates of today

media-sound/yoshimi: Add 1.5.9, delete old versions

https://github.com/Yoshimi/yoshimi/commits/master/Changelog

app-i18n/mozc-ut2: Update Manifest of yusei zip code archives (Oct 31 2018)

 https://www.post.japanpost.jp/zipcode/download.html

x11-misc/mozo: Change mate-base/mate-menus[python] dependency to [python(+)] 

https://github.com/mate-desktop/mate-menus/commit/71e85c1