Replaces Xor by Either type

Author: juanpedromoreno

src/main/scala/org/scalaexercises/exercises/Exercises.scala

@@ -12,7 +12,6 @@ import scala.reflect.ClassTag
 import java.net.URLClassLoader
 import java.io.File
 
-import cats.data.Xor
 import cats.implicits._
 import org.clapper.classutil.ClassFinder
 import org.scalaexercises.evaluator.Dependency
@@ -56,7 +55,7 @@ object Exercises {
   }
 
   private def guard[A](f: ⇒ A, message: ⇒ String) =
-    Xor.catchNonFatal(f).leftMap(_ ⇒ message)
+    Either.catchNonFatal(f).leftMap(_ ⇒ message)
 
   def buildEvaluatorRequest(
     pkg:                 String,

src/test/scala/com/fortysevendeg/exercises/ExampleTarget.scala

@@ -17,5 +17,5 @@ object ExampleTarget extends FlatSpec with Matchers {
     throw new ExampleException
   }
 
-  def takesXorMethod(xor: cats.data.Xor[_, _]): Boolean = true
+  def takesEitherMethod(either: Either[_, _]): Boolean = true
 }