Update brew.plugin.zsh

Add `brew cleanup` command to `bubu` alias

Update brew.plugin.zsh
Add `brew cleanup` command to `bubu` alias
877d55ce · Nicolas Brousse · cea29ff7 · 877d55ce
Commit 877d55ce authored Jul 20, 2014 by Nicolas Brousse
--- a/plugins/brew/brew.plugin.zsh
+++ b/plugins/brew/brew.plugin.zsh
 alias brews='brew list -1'
-alias bubu="brew update && brew upgrade"
+alias bubu="brew update && brew upgrade && brew cleanup"