IBOutlet on SideMenu is nil

[Alecattie]

• [x] I have verified there are no duplicate active or recent bugs, questions, or requests

Include the following:

• AKSideMenu version: 1.4.5
• Device OS version: 13.0
• Device Name: iPhone 11 Pro Max

Reproduction Steps

1. add an outlet to the SideMenuViewController like a label or a button via storyboard
2. Change its properties programmatically in the ViewDidLoad example: label.text = "hello world!"

Expected Result

Label to say hello world

Actual Result

the line that changes the label is nil and crashes upon app launch

Tell us what could be improved:

Add option to add IBOutlets to SideMenus and change properties programmatically