Don't error out if never `brew updated`
Don't error out if never `brew updated`

Fixes Homebrew/homebrew#12944.
hanxue/linuxbrew,vitorgalvao/brew,zmwangx/brew,claui/brew,sjackman/homebrew,JCount/brew,nandub/brew,aw1621107/brew,mahori/brew,palxex/brew,EricFromCanada/brew,staticfloat/brew,palxex/brew,amar-laksh/brew_sudo,sjackman/homebrew,Linuxbrew/brew,reitermarkus/brew,maxim-belkin/brew,Homebrew/brew,vitorgalvao/brew,reitermarkus/brew,amar-laksh/brew_sudo,alyssais/brew,rwhogg/brew,konqui/brew,DomT4/brew,sjackman/homebrew,EricFromCanada/brew,alyssais/brew,pseudocody/brew,staticfloat/brew,aw1621107/brew,reitermarkus/brew,sjackman/homebrew,nandub/brew,mgrimes/brew,gregory-nisbet/brew,zmwangx/brew,AnastasiaSulyagina/brew,gordonmcshane/homebrew,MikeMcQuaid/brew,JCount/brew,DomT4/brew,gordonmcshane/homebrew,Linuxbrew/brew,alyssais/brew,hanxue/linuxbrew,pseudocody/brew,mahori/brew,ilovezfs/brew,MikeMcQuaid/brew,toonetown/homebrew,toonetown/homebrew,gregory-nisbet/brew,MikeMcQuaid/brew,muellermartin/dist,reelsense/brew,reitermarkus/brew,reelsense/brew,JCount/brew,claui/brew,mistydemeo/homebrew,claui/brew,JCount/brew,claui/brew,ilovezfs/brew,nandub/brew,staticfloat/brew,hanxue/linuxbrew,mistydemeo/homebrew,mgrimes/brew,maxim-belkin/brew,mgrimes/brew,muellermartin/dist,toonetown/homebrew,maxim-belkin/brew,reelsense/brew,pseudocody/brew,konqui/brew,gregory-nisbet/brew,nandub/brew,MikeMcQuaid/brew,palxex/brew,tonyg/homebrew,tonyg/homebrew,DomT4/brew,aw1621107/brew,gordonmcshane/homebrew,tonyg/homebrew,muellermartin/dist,zmwangx/brew,DomT4/brew,rwhogg/brew,EricFromCanada/brew,vitorgalvao/brew,mistydemeo/homebrew,vitorgalvao/brew,EricFromCanada/brew,amar-laksh/brew_sudo,jmsundar/brew,AnastasiaSulyagina/brew,Homebrew/brew,mahori/brew,Homebrew/brew,jmsundar/brew,konqui/brew,konqui/brew,Linuxbrew/brew,AnastasiaSulyagina/brew,jmsundar/brew,ilovezfs/brew,mahori/brew,Linuxbrew/brew,bfontaine/brew,bfontaine/brew,Homebrew/brew,rwhogg/brew,bfontaine/brew