v6.0.0

• Added maxIndent, noIndent, and propertyFilter stringification options.
• Added context callback parameter for both replacers and revivers with context.holder and context.stack values.
• The above results in a breaking change from 5.x versions of JSON-Z, where the third parameter of a replacer/reviver callback might be expected, depending on context, to be a holder object. This change results in a more consistent callback paradigm.