workmanager package has issues with ios. How can I solve this? Workmanager package version: 0.5.2:

AppDelegate.swift file:
import UIKit
import Flutter
import Firebase
import workmanager

Podfile:
platform :ios, ‘13.0’

I followed the ios setup but still got errors saying **Compiling for iOS 12.0, but module ‘workmanager’ has a minimum deployment target of iOS, **

I tried to run ios on my physical ios device and it is for running the code in the background periodically.