message: Update yarn in CI
diff: @@ -21,7 +21,7 @@ addons:
  - libstdc++-4.9-dev
  cache: yarn
  before_install:
  - - curl -o- -L https://yarnpkg.com/install.sh | bash -s -- --version 1.3.2
  + - curl -o- -L https://yarnpkg.com/install.sh | bash -s -- --version 1.5.1
  - export PATH=$HOME/.yarn/bin:$PATH
  script: npm run build
  after_success:
  