[zanata/zanata-platform] 970261: Upgrade required yarn version

[GitHub]

  Branch: refs/heads/remove-engines
  Home:   https://github.com/zanata/zanata-platform
  Commit: 97026117bb2ac5ffa56433bbf706d06a7e21e465
      https://github.com/zanata/zanata-platform/commit/97026117bb2ac5ffa56433bbf706d06a7e21e465
  Author: David Mason <drdmason at gmail.com>
  Date:   2017-10-09 (Mon, 09 Oct 2017)

  Changed paths:
    M server/zanata-frontend/src/frontend/.yarn-version

  Log Message:
  -----------
  Upgrade required yarn version