SMono.cast/ofType now accept implicit ClassTag instead of Class

[rs017991]

This change allows a user to write code like:

myMono.cast[String]

... instead of:

myMono.cast(classOf[String])

SFlux.cast/ofType were already written this way; I merely changed SMono to do it as well.

Note that this would be a breaking change, but perhaps you will agree that this is appropriate for v0.5.0?

[sinwe]

@rs017991 Thanks for your PR.
I agree that this is a breaking changes and should go to v0.5.0.
However this change is making it consistent with SFlux. How about we retain the myMono.cast(classOf[String]) one while adding the myMono.cast[String] and put @deprecated on the prior?

[rs017991]

@sinwe It didn't occur to me that the two could co-exist, but I think you're right.

I'll give that a shot

[sinwe]

Released on v0.4.6