我正在尝试将我的heroku应用程序迁移到Cedar 14 (如下所示:)Only the most recent version of Ruby 2.1 is supported on Cedar-14
remote: !retry-delay 1 --connect-timeout 3 --max-time 30 https://s3-external-1.amazonaws.com/heroku-build
我正在尝试使用Heroku文档中的以下命令将Heroku上的几个Django应用程序升级到Cedar-14:Stack set.Next release on project-name will use cedar-14.Run `git push heroku master` to create a new release on cedar-14.➜ project-name git:(master) ✗