Upgrades:

• Picard 2.20.5 -> 2.21.1
• Cromwell 33.1 -> 47
• dxWDL 0.72 -> v1.33
  • dx-docker replaced with native OS docker
  • dx download replaced with dxda
• dx-toolkit v0.285.0 -> v0.288.0
• all dx_instance_types in WDL runtimes to v2 DNAnexus instance types

Bugfixes:

• krona failed when output file was on a different filesystem from TMPDIR
• krona attempted to repeatedly reinstall itself due to version documentation mismatch