v0.21.1

HyperQueue 0.21.1

Fixes

• Fixes random task crashes. Details in #823.

Artifact summary:

• hq-v0.21.1-*: Main HyperQueue build containing the hq binary. Download this archive to
  use HyperQueue from the command line.
• hyperqueue-0.21.1-*: Wheel containing the hyperqueue package with HyperQueue Python
  bindings.