Derive [higher-kind] type-classes for DSLs with multiple type parameters

[einepeople]

Currently, derevo fails to derive, e.g. functorK, for traits, which are not in the form trait Foo[F[_]]{...}
Additional type parameters make it fail, for example, the following snippet:

@derive(functorK)
trait FooCache[F[_], K, V] {
  def get(key: K): F[Option[V]]
  def upsert(key: K, value: V): F[Unit]
  def invalidate(key: K): F[Unit]
}

will result in

wrong number of type arguments for org.package.FooCache, should be 3