Log Message:
xmoji: update to 0.8.

Features:

    Add tooling for localized UI texts and Emoji names imported from
    Unicode CLDR
    Add translations for German (de)
    Improve search, show groups (skin-tone variants of the same Emoji) in
    search results and make it configurable what exactly the search looks
    at: original and/or translated names, and whether or not to consider
    other "variant" descriptions after a colon in the name
    Implement the _NET_WM_PING protocol and associated window properties,
    allowing a window manager to know when and how to force-kill Xmoji