cannot use _schedule cron>

[danielnorberg]

$ cat digdag.yml
run: +main
timezone: "America/Los_Angeles"

+main:
  _schedule:
    cron>: 42 4 1 * *

  sh>: echo hello world

$ digdag push dano-cron-test -r 1
2016-04-11 15:46:26 -0700: Digdag v0.5.9
Creating digdag.archive.tar.gz...
  Archiving digdag.yml
Workflows:
  +main

error: Status code 400: {"message":"Parameter 'cron' is required but not set","status":400}

[frsyuki]

fixed