Rasql supports nilValue with string interval in array

[Bang Pham Huu]

Current, rasql seems can parse the interval of nilValues in array of JSON without any error about the JSON validity, such as:

\"nodata\":[0:20]}"

However, the 0:20 is not valid for JSON array, it should work if 0:20 is a string \"0:20\", such as:

{
	"nodata": ["0:5", 1, 2, 3],
	"geoReference": {
		"crs": "EPSG:4326"
	}
}