Move test to 2.13+

Author: armanbilge

tests/shared/src/test/scala-2.13+/cats/tests/ScalaVersionSpecific.scala

@@ -121,6 +121,10 @@ trait ScalaVersionSpecificFoldableSuite { self: FoldableSuiteAdditional =>
     assert((1 #:: boomLazyList[Int]).findM[Id](_ > 0) == Some(1))
     assert((1 #:: boomLazyList[Int]).collectFirstSomeM[Id, Int](Option.apply) == Some(1))
   }
+
+  test("#4244 ambiguous `contains_` syntax") {
+    assertEquals(List("a").map(List("a").contains_), List(true))
+  }
 }
 
 trait ScalaVersionSpecificParallelSuite { self: ParallelSuite =>

tests/shared/src/test/scala/cats/tests/RegressionSuite.scala

@@ -203,8 +203,4 @@ class RegressionSuite extends CatsSuite with ScalaVersionSpecificRegressionSuite
     val program = StateT.modify[Either[Throwable, *], Int](_ + 1).reject { case _ if false => new Throwable }
     assert(program.runS(0).toOption === (Some(1)))
   }
-
-  test("#4244 ambiguous `contains_` syntax") {
-    assertEquals(List("a").map(List("a").contains_), List(true))
-  }
 }