changeConfig method
Implementation
void changeConfig(SeatingConfigChange configChange) {
final configMap = configChange.toMap();
String configJson = jsonEncode(configMap);
configJson = configJson.replaceAll("'", "\\\'");
final jsString = "changeConfig('$configJson', postMessageToFlutter)";
debugPrint("[Seatsio]-> changeConfig jsString: $jsString");
seatsioController.evaluateJavascript(jsString);
}