withCache can not add Authorization header

[sysmat]

I'm submitting a...

[ ] Regression (a behavior that used to work and stopped working in a new release)
[x] Bug report  
[ ] Performance issue
[ ] Feature request
[ ] Documentation issue or request
[ ] Support request
[ ] Other... Please describe:

Current behavior

Can not add HTTP header with withCache

Expected behavior

Minimal reproduction of the problem with instructions

What is the motivation / use case for changing the behavior?

export interface HttpOptions {
    headers: HttpHeaders;
    params?: HttpParams;
}

I think this kind of interface would be better to easy adding headers or parms with withCache function

Environment

Angular version: 11.2.9

Browser:

• Chrome (desktop) version XX
• Chrome (Android) version XX
• Chrome (iOS) version XX
• Firefox version XX
• Safari (desktop) version XX
• Safari (iOS) version XX
• IE version XX
• Edge version XX

For Tooling issues:

• Node version: 14
• Platform: Windows 10

Others:

[NetanelBasal]

#11