fix(test): fixes #31

Author: Csaba Tuncsik

src/main/scala/stdlib/Traversables.scala

@@ -146,7 +146,7 @@ object Traversables extends FlatSpec with Matchers with exercise.Section {
 
   /** `toStream` will convert any *Traversable* to a `Stream` which is a lazy list where elements are evaluated as they are needed.
     */
-  def toStreamFunctionTraversables(res0: Boolean, res1: List[Int]) {
+  def toStreamFunctionTraversables(res0: Boolean, res1: Stream[Int]) {
     val list = List(4, 6, 7, 8, 9, 13, 14)
     val result = list.toStream
     result.isInstanceOf[Stream[_]] should be(res0)

src/test/scala/exercises/stdlib/TraversablesSpec.scala

@@ -130,7 +130,7 @@ class TraversablesSpec extends Spec with Checkers {
     check(
       Test.testSuccess(
         Traversables.toStreamFunctionTraversables _,
-        true :: List(4, 6, 7) :: HNil
+        true :: Stream(4, 6, 7) :: HNil
       )
     )
   }