v0.4
add hash and array to params validator
Allow values to be more than one type
Bump version to 0.4.1
Fix homepage URL
Support for array properties

These are still pretty rare but we've been using them for batch updates
(see PATCH /apps/:id/formation in the V3 platform API).
Set version to 0.4.2
add array support again
Alphabetize
support decimal in date-time format