A valid JSON string
Depending on the specific JSON data received, this function can return almost any Squirrel data type: table, array, string, float, integer, bool or
null. However, it cannot return or invoke Squirrel functions, and thus is ‘safe’ to use with untrusted data from the Internet.
Tables and arrays can be nested up to five levels deep.
A Squirrel error is produced if the JSON is not valid. This error can be detected using Squirrel’s normal try ... catch mechanism.
The corresponding encoding operation is http.jsonencode().