machine:
  xcode:
    version: "8.3.3"
dependencies:
  pre:
    - gem install bundler
    - gem install xcpretty
    - gem install cocoapods
    - brew install swiftlint
    - ./Scripts/update_dependencies.sh
test:
  override:
    - ./Scripts/test.sh

machine:
  xcode:
    version: "9.0"
dependencies:
  pre:
    - gem install bundler
    - gem install xcpretty
    - gem install cocoapods
    - brew install swiftlint
    - ./Scripts/update_dependencies.sh
test:
  override:
    - ./Scripts/test.sh

Update Xcode machine in Circle
Update Xcode machine in Circle
