outdated: always do comparisons with a Formula as the receiver
outdated: always do comparisons with a Formula as the receiver

It is possible for the object returned by Formula#version to be a
subclass of Version with special behavior, so we want to use that for
the comparison.

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