completions/zsh: add --greedy argument for `brew cask outdated`
completions/zsh: add --greedy argument for `brew cask outdated`

nandub/brew,nandub/brew,vitorgalvao/brew,JCount/brew,konqui/brew,JCount/brew,JCount/brew,sjackman/homebrew,reitermarkus/brew,EricFromCanada/brew,claui/brew,sjackman/homebrew,Homebrew/brew,EricFromCanada/brew,MikeMcQuaid/brew,nandub/brew,claui/brew,mahori/brew,MikeMcQuaid/brew,Homebrew/brew,Homebrew/brew,sjackman/homebrew,vitorgalvao/brew,reitermarkus/brew,MikeMcQuaid/brew,vitorgalvao/brew,konqui/brew,MikeMcQuaid/brew,mahori/brew,mahori/brew,mahori/brew,reitermarkus/brew,sjackman/homebrew,EricFromCanada/brew,nandub/brew,JCount/brew,vitorgalvao/brew,reitermarkus/brew,claui/brew,claui/brew,EricFromCanada/brew,Homebrew/brew,konqui/brew,konqui/brew