message: "use xvfb as service; updates #11"
diff: @@ -4,6 +4,8 @@ compiler: gcc
  sudo: required
  dist: bionic
  +services:
  + - xvfb
  addons:
  apt:
  packages:
  @@ -11,10 +13,10 @@ addons:
  - qtdeclarative5-dev
  - libqt5charts5-dev
  -before_script:
  - - "export DISPLAY=:99.0"
  - - "sh -e /etc/init.d/xvfb start"
  - - sleep 3 # give xvfb some time to start
  +#before_script:
  +# - "export DISPLAY=:99.0"
  +# - "sh -e /etc/init.d/xvfb start"
  +# - sleep 3 # give xvfb some time to start
  script:
  - mkdir build
  