Fix Travis deprecation error.
Fix Travis deprecation error.

JCount/brew,Linuxbrew/brew,Homebrew/brew,hanxue/linuxbrew,DomT4/brew,sjackman/homebrew,Homebrew/brew,mahori/brew,reitermarkus/brew,claui/brew,EricFromCanada/brew,hanxue/linuxbrew,DomT4/brew,claui/brew,nandub/brew,sjackman/homebrew,maxim-belkin/brew,MikeMcQuaid/brew,claui/brew,reelsense/brew,nandub/brew,vitorgalvao/brew,claui/brew,mgrimes/brew,nandub/brew,MikeMcQuaid/brew,vitorgalvao/brew,vitorgalvao/brew,MikeMcQuaid/brew,vitorgalvao/brew,sjackman/homebrew,konqui/brew,ilovezfs/brew,reelsense/brew,nandub/brew,EricFromCanada/brew,konqui/brew,alyssais/brew,ilovezfs/brew,EricFromCanada/brew,mahori/brew,EricFromCanada/brew,JCount/brew,mgrimes/brew,Linuxbrew/brew,Linuxbrew/brew,Homebrew/brew,DomT4/brew,reitermarkus/brew,MikeMcQuaid/brew,Linuxbrew/brew,Homebrew/brew,konqui/brew,JCount/brew,reelsense/brew,reitermarkus/brew,alyssais/brew,ilovezfs/brew,maxim-belkin/brew,JCount/brew,DomT4/brew,reitermarkus/brew,mgrimes/brew,mahori/brew,mahori/brew,alyssais/brew,sjackman/homebrew,hanxue/linuxbrew,maxim-belkin/brew,konqui/brew