message: Use the lockfile during CI and don't update it.
diff: @@ -8,7 +8,7 @@ jobs:
  pool:
  vmImage: 'Ubuntu-16.04'
  steps:
  - - script: yarn install
  + - script: yarn install --frozen-lockfile
  displayName: 'Yarn install'
  - script: yarn run package-commands-zip
  displayName: 'Run yarn package-commands-zip'
  @@ -27,7 +27,7 @@ jobs:
  pool:
  vmImage: 'Ubuntu-16.04'
  steps:
  - - script: yarn install
  + - script: yarn install --frozen-lockfile
  displayName: "yarn install"
  - script: yarn run electron-rebuild
  displayName: "yarn run electron-rebuild"
  