I've found lately JSONs with unquoted String values (it seems to be called [relaxed json](http://www.relaxedjson.org/)), so I've updated the code to support those:

In this version, if you set the setting `JsonOptions.AllowUnquotedKeys` to `True` it will also allow unquoted Strings. Unquoted Strings (in this version) end once we find a space, a coma, a "}" or a "]".

Notice that this will capture the true/false/null/numbers as strings (not having the quotes to identify the strings, all are a potential Strings), so we check them afterwards and:
- If `IsNumeric()` we 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.

Added support for unquoted String Values

If json_ParseValue gets converted to boolean, then it returns isNumeric() -> true, leading to errors (since then true/false get converted to 0 through VBA.Val().
Now IsNumeric() check runs first, skipping that use case.