Additional combine publisher extensions to support combining 5 publishers

[heecheon92]

Is your feature request related to a problem? Please describe.

Sometimes, it is necessary to observe values published from more than 4 events or publishers in which Apple's current implementation supports. Being able to handle five publishers alleviate situations where complex events need to be handled with latest values.

Describe the solution you'd like
Adding additional extension for "combineLatest" such that the function takes 4 additional publishers as parameter.

Describe alternatives you've considered
I have tried generic parameter pack introduces Swift 5.9 so that adding arbitrary numbers of publishers to combineLatest could be possible but the newly implemented feature does not yet support enough flexibility put generic constraint.

• [O ] I've read, understood, and done my best to follow the Contributing guidelines before opening this issue.