message: golang version is too old
diff: @@ -197,7 +197,7 @@ jobs:
  publish-github-releases:
  docker:
  - - image: circleci/golang:1.8
  + - image: circleci/golang:1.12
  steps:
  - attach_workspace:
  at: /tmp/workspace
  @@ -220,20 +220,17 @@ jobs:
  else
  echo "Current build is not tagged."
  fi
  +
  workflows:
  version: 2
  build-releases:
  jobs:
  - build-linux:
  filters:
  - branches:
  - ignore: /.*/
  tags:
  only: /^v\d+\.\d+\.\d+(-alpha\.\d+)?$/
  - build-windows:
  filters:
  - branches:
  - ignore: /.*/
  tags:
  only: /^v\d+\.\d+\.\d+(-alpha\.\d+)?$/
  - build-docker:
  