Make path.FreeSpecSpec and path.FunSpecSpec to pass in Scala 2.13.0-M5.

Author: cheeseng

scalatest-test/src/test/scala/org/scalatest/path/FreeSpecSpec.scala

@@ -245,7 +245,7 @@ class FreeSpecSpec extends org.scalatest.FunSpec with GivenWhenThen {
 
     it("should create new instance as FreeSpecLike") {
       val spec = new ExampleFreeSpecLike
-      assert(spec.newInstance.isInstanceOf[FreeSpecLike])
+      assert(spec.newInstance.isInstanceOf[org.scalatest.path.FreeSpecLike])
     }
 
     describe("(with info calls)") {

scalatest-test/src/test/scala/org/scalatest/path/FunSpecSpec.scala

@@ -137,7 +137,7 @@ class FunSpecSpec extends org.scalatest.FreeSpec with GivenWhenThen {
 
     "should create new instance as FunSpecLike" in {
       val spec = new ExampleFunSpecLike
-      assert(spec.newInstance.isInstanceOf[FunSpecLike])
+      assert(spec.newInstance.isInstanceOf[org.scalatest.path.FunSpecLike])
     }
 
     "(with info calls)" - {