`adapt` method forces the user to explicate a lot of type params

[sullivan-]

All three of the type arguments to adapt should be inferrable by the compiler. The first and the third argument are inferrable from the argument, fs2Stream, and the second argument should be inferrable from the left-hand side. But I haven't figured out how to get the compiler to infer any of them yet. Can you help? It's not as simple as you might think, because the implicit resolution has to navigate between types with two type parameters, such as Enumerator[Eval,Int], and types with a single type parameter, such as streamadapter.iterateeio.EvalEnumerator[Int].