brew-test-bot: build changed dependencies first.
brew-test-bot: build changed dependencies first.

And don't uninstall them in-between. This should fix the issues where
if e.g. OpenSSL changes in a pull request then it's only the dependents
after it alphabetically would be built against the new version.

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