0.19.1

0.19.1 is a bug fix release that addresses several critical regressions introduced
in 0.19.0.

Bug fixes

• Fix an issue where messages failed validation because the message certificate
  and signature were unicode objects (#456).

• Fix an issue where message bodies were not deserialized from JSON before being
  passed to a consumer because the message bodies were unicode objects (#464).

• Fix an issue where messages never got passed to the consumer because the
  message pre-processing caused an unhandled exception (#462).

Many thanks to the contributors for this release:

• Kamil Páral
• Jeremy Cline
• Patrick Uiterwijk
• Ralph Bean
• Ricky Elrod