[Bionic] zsh-antigen is broken

[Dmitry Lapshin]

Hello there,

Please rebuild/reupload `zsh-antigen` package, it's broken: on launch
(when sourced from Z shell) it says "Command not found:
-antigen-env-setup", and there is no such function in file, actually.
But here it is present in source repo:
https://github.com/zsh-users/antigen/blob/develop/bin/antigen.zsh .
Versions do match, unfortunately.

Hopefully it won't take long to fix) Thank all you for your work on Ubuntu,

Dmitry.