tap-new: cleanup and update Travis configuration.
tap-new: cleanup and update Travis configuration.

- Use macOS Sierra 10.12 and Xcode 8.
- Add indentation.

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