bump testflight
bump testflight

Submodule src/github.com/concourse/testflight ae3b9e6..8b53592:
  > fix guid server registering

concourse/concourse,concourse/concourse,cjcjameson/concourse,cjcjameson/concourse,cjcjameson/concourse,concourse/concourse,concourse/concourse,concourse/concourse