Add `>*<`, an infix operator for `divided`

[Gabriella439]

The haddocks for the operator provide the motivation, but for some additional context this was originally created within Dhall for combining Divisible RecordEncoders:

https://hackage.haskell.org/package/dhall-1.36.0/docs/Dhall.html#t:RecordEncoder

… and the purpose of this change is to upstream the operator into the contravariant package.

[masaeedu]

@ekmett sorry about the direct ping, but just wondering is there something blocking this or if it just fell through the cracks? Seems like an obviously good, well documented, small change.

[ekmett]

Slipped through the cracks.

[masaeedu]

Awesome, thank you!