message: Upgrade yarn version in CI
diff: @@ -3,7 +3,7 @@ node_js:
  - "10.10.0"
  sudo: false
  before_install:
  - - curl -o- -L https://yarnpkg.com/install.sh | bash -s -- --version 1.5.1
  + - curl -o- -L https://yarnpkg.com/install.sh | bash -s -- --version 1.22.4
  - export PATH=$HOME/.yarn/bin:$PATH
  cache:
  yarn: true
  