Change iOS build number so it matches Unity Cloud Build build version

BuildVersionPostProcess.cs

using UnityEngine;
using UnityEditor.Callbacks;
using System;
using System.Collections;
using UnityEditor;
using UnityEngine.Networking;
#if UNITY_IOS
using UnityEditor.iOS.Xcode;
#endif
using System.IO;

public class BuildVersionPostProcess 
{
	private static string projectName = "yourProjectName";
	private static string companyName = "yourCompanyName";
	private static string androidBuildTargetName = "yourAndroidBuildTarget";
	private static string iOSBuildTargetName = "youriOSBuildTarget";
  private static string AuthorizationToken = "Basic [APIKEY]";//[APIKEY] can be found at https://developer.cloud.unity3d.com/preferences/

	[PostProcessBuild(101)]
	public static void OnPostprocessBuild(BuildTarget buildTarget, string buildPath)
	{
		if (buildTarget != BuildTarget.Android && buildTarget != BuildTarget.iOS)
		{
			Debug.LogWarning("Can't change buildVersion, only iOS and Android are supported. Not " + buildTarget.ToString());
			return;
		}
			
		int buildNumber = FindLatestBuildNumber(buildTarget == BuildTarget.Android ? androidBuildTargetName : iOSBuildTargetName);
		AssignBuildNumber(buildNumber, buildPath);
    }

	private static int FindLatestBuildNumber(string buildTarget)
	{
		string url = string.Format("https://build-api.cloud.unity3d.com/api/v1/orgs/{0}/projects/{1}/buildtargets/{2}/builds", companyName, projectName, buildTarget);
		UnityWebRequest www = UnityWebRequest.Get(url);
		www.SetRequestHeader("Content-Type", "application/json");
		www.SetRequestHeader("Authorization", AuthorizationToken);
		AsyncOperation op = www.Send();

		while (!op.isDone);

		if(www.isError) 
		{
			Debug.Log(www.error);
			return 1;
		}

		string dlText = www.downloadHandler.text;
		int end = dlText.IndexOf(',');
		string begin = dlText.Substring(0, end);
		int correctVersion = int.Parse(begin.Replace("[{\"build\":", ""));

		return correctVersion;
	}

	private static void AssignBuildNumber(int correctBuildNumber, string buildPath)
	{
		Debug.Log("Assigning build number: " + correctBuildNumber);
		#if UNITY_IOS
		ChangeXCodeBuildNumber(correctBuildNumber, buildPath);
		#elif UNITY_ANDROID
		ChangeAndroidBuildNumber(correctBuildNumber, buildPath);
		#endif
	}

	#if UNITY_IOS
	private static void ChangeXCodeBuildNumber(int correctBuildNumber, string buildPath)
	{
		string projPath = Path.Combine(buildPath, "Info.plist");

		PlistDocument plist = new PlistDocument();
		plist.ReadFromString(File.ReadAllText(projPath));
		PlistElementDict rootDict = plist.root;
		string buildKey = "CFBundleVersion";
		rootDict.SetString(buildKey, correctBuildNumber.ToString());

		File.WriteAllText(projPath, plist.WriteToString());
	}
	#endif

	private static void ChangeAndroidBuildNumber(int correctBuildNumber, string buildPath)
	{
		
	}
}