0.22.2

compare

• Discard all extra map keys from properties (#77)
• All Schema extra keys
  are now exposed as Swagger additional properties.
  • Previously only s/Keyword were supported.
• Fix JSON Schema nil default value (#79)
• Updated dependencies:

[prismatic/schema "1.0.4"] is available but we use "1.0.3"
[potemkin "0.4.3"] is available but we use "0.4.1"