Business Layer; ISKeyValueList.GetDate() method; Now handles JSON formatted date strings

Previously, the ISKeyValueList.GetDate() method did not handle JSON formatted date strings. This meant that, when running a 'General' type Script from finPOWER Connect Cloud, you needed to interpret dates differently to when the Script was running under desktop.

JSON formatted dates such as the following are now supported, meaning that 'General' Scripts can use parameters.GetDate() to retrieve values correctly in both desktop and finPOWER Connect Cloud.

• "2023-08-18T00:00:00.000Z"
• 2023-08-18T00:00:00.000Z