How to force CI to use the latest pods after project was moved to Xcode 10 and latest wift 4.2?

问题

The question is because we see an error after moving project to the latest Xcode 10 and Swift 4.2:

My fastfile looks like:

before_all do
  xcversion(version: "10.0")
end

lane :test do
  scan(scheme: SCHEME_NAME, code_coverage: true, output_directory: OUTPUT_PATH + 'tests')
  xcov(
    scheme: SCHEME_NAME, 
    workspace: WORKSPACE_FILE_PATH, 
    json_report: true, 
    markdown_report: true, 
    output_directory: OUTPUT_PATH + "coverage", 
    skip_slack: true,
    only_project_targets: true
  )
end

and gitlab-ci.yml:

stages:
  - build
  - test
  - deploy
  - export

build:
  stage: build
  script:
    - bundle exec pod repo update
    - bundle exec pod install
    - export
  after_script:
    - rm -rf ~/Library/Developer/Xcode/Archives || true
  artifacts:
    name: "Staff_${CI_PIPELINE_ID}"
    paths:
      - Pods/*
      - Staff.xcworkspace
  when: on_success
  tags:
      - iOS

test:
  stage: test
  before_script:
    - killall "Simulator" || true
  script:
    - bundle exec fastlane snapshot reset_simulators --force
    - bundle exec fastlane test
  after_script:
    - killall "Simulator" || true
    - rm -rf ~/Library/Developer/Xcode/Archives || true
  artifacts:
    name: "Staff_${CI_PIPELINE_ID}"
    paths:
      - fastlane/output/coverage
  when: on_success
  tags:
    - iOS

来源：https://stackoverflow.com/questions/52406240/how-to-force-ci-to-use-the-latest-pods-after-project-was-moved-to-xcode-10-and-l