Add Esperanto translation
We were unable to push the translation to cantarell-fonts via DamnedLies:
https://l10n.gnome.org/vertimus/cantarell-fonts/master/appstream/eo/
"An error occurred during applying your action: The commit failed. The error was: “[Errno 1] Command: "['git', 'push', 'origin', 'master']", Error: remote: GitLab: You are not allowed to push code to protected branches on this project. To gitlab.gnome.org:GNOME/cantarell-fonts.git ! [remote rejected] master -> master (pre-receive hook declined) error: failed to push some refs to 'git@gitlab.gnome.org:GNOME/cantarell-fonts.git' ”"
So here's the Esperanto translation in a Merge Request.