message: Add maps and non-contiguous arrays to reader table
diff: @@ -13,20 +13,28 @@ Below is a table that lists supported features:
  * - Language
  - Types
  - Functions
  - - Simple Arrays
  + - Arrays
  + - Maps
  - Mixed-typed key Arrays
  + - Non-contiguous Arrays
  * - JSON
  - bool, double, int, string
  -
  - X
  + - X
  + -
  -
  * - Lua
  - bool, double, int, string
  - X
  - X
  - X
  + - X
  + - X
  * - YAML
  - bool, double, int, string
  -
  - X
  + - X
  + -
  -
  