azure-pipelines.yml: use xcode 10
azure-pipelines.yml: use xcode 10

Homebrew/brew,konqui/brew,Linuxbrew/brew,vitorgalvao/brew,mahori/brew,mahori/brew,reitermarkus/brew,JCount/brew,claui/brew,Linuxbrew/brew,EricFromCanada/brew,konqui/brew,nandub/brew,Linuxbrew/brew,MikeMcQuaid/brew,Homebrew/brew,Linuxbrew/brew,EricFromCanada/brew,Homebrew/brew,claui/brew,mahori/brew,MikeMcQuaid/brew,reitermarkus/brew,vitorgalvao/brew,nandub/brew,JCount/brew,sjackman/homebrew,claui/brew,MikeMcQuaid/brew,reitermarkus/brew,sjackman/homebrew,sjackman/homebrew,konqui/brew,MikeMcQuaid/brew,JCount/brew,vitorgalvao/brew,EricFromCanada/brew,mahori/brew,vitorgalvao/brew,JCount/brew,Homebrew/brew,nandub/brew,konqui/brew,sjackman/homebrew,reitermarkus/brew,EricFromCanada/brew,nandub/brew,claui/brew