p-sidebar appendTo has wrong type

[adcore-dev]

[x] bug report => Search github for a similar issue or PR before submitting
[ ] feature request => Please check if request is not on the roadmap already https://github.com/primefaces/primeng/wiki/Roadmap
[ ] support request => Please do not submit support request here, instead see http://forum.primefaces.org/viewforum.php?f=35

What is the motivation / use case for changing the behavior?
appendTo to different parent not working
p-sidebar appendTo require string but should require any

primeng/src/app/components/sidebar/sidebar.ts

Line 47 in 51aa639

@Input() appendTo: string;

• Angular version: 5.X
  11.1.0
• PrimeNG version: 5.X
  11.2.0