Added support for unquoted String Values

[asopenag]

In current version, you can enable unquoted keys by using JsonOptions.AllowUnquotedKeys = True, but that doesn’t capture unquoted values (except, of course, for reserved values like numbers or null). But it may happen that you find unquoted values for strings with just one word (I think that’s called relaxed json).

Example: {firstName: John, lastName: Smith}

I have update the code to cover those cases.

How to enable:
Just set the setting JsonOptions.AllowUnquotedKeys to True, it will now also capture those 1-word unquoted String values.

Implementation notes:

• I assume unquoted String values end once we find a space, a coma, a "}" or a "]" (longer/complex strings are expected to come quoted).
• For this to work, I assume first that all values are strings (including true/false/null/numbers), then I check, and...
  • If IsNumeric() I convert the value back to number using VBA.Val().
  • If = "null" -> Null
  • If = "true" / "false" -> True / False

Next steps:
We should clarify the setting JsonOptions.AllowUnquotedKeys : (a) rename it to clarify it works for both key and values or (b) create a new setting to allow unquote key/values separately.

Thanks!