Broken build. Missing Promise.cs file

[janis-veinbergs]

Hello.

When cloning repo, there is a missing file that is included in the project: '...\SparkleXrm\SparkleXrmSource\SparkleXrm\ES6\Promise.cs'.

Removing project reference leads to this error:

Severity	Code	Description	Project	File	Line	Suppression State
Error	CS0246	The type or namespace name 'ES6' could not be found (are you missing a using directive or an assembly reference?)	SparkleXrm	...\SparkleXrm\SparkleXrmSource\SparkleXrm\XrmImport\Utility.cs	3	Active

Could you please add this file?