testing/[powerline-extra-symbols|oh-my-zsh]: upgrade to latest git versions
Upgrades oh-my-zsh
and powerline-extra-symbols
to latest git version.
Both in same MR as powerline-extra-symbols
is just dep for oh-my-zsh
.
Closes #12507 (closed)
PS. Should/could I set myself as an Maintainer? Original one seem to not care about Alpine anymore.