fix test class

Author: eli-darkly

tests/EventFactoryTest.php

@@ -7,7 +7,7 @@
 use LaunchDarkly\LDUserBuilder;
 use LaunchDarkly\Impl\EventFactory;
 
-class EventFactoryTest extends \PHPUnit_Framework_TestCase
+class EventFactoryTest extends \PHPUnit\Framework\TestCase
 {
     private function buildFlag($trackEvents)
     {

tests/RolloutRandomizationConsistencyTest.php

@@ -17,7 +17,7 @@
   * is identical across SDKs.
   */
 
-class RolloutRandomizationConsistencyTest extends \PHPUnit_Framework_TestCase
+class RolloutRandomizationConsistencyTest extends \PHPUnit\Framework\TestCase
 {
     public function buildFlag()
     {

tests/RolloutTest.php

@@ -3,7 +3,7 @@
 
 use LaunchDarkly\Rollout;
 
-class RolloutTest extends \PHPUnit_Framework_TestCase
+class RolloutTest extends \PHPUnit\Framework\TestCase
 {
     public function testRolloutPropertiesAreSet()
     {

tests/VariationOrRolloutTest.php

@@ -4,7 +4,7 @@
 use LaunchDarkly\LDUserBuilder;
 use LaunchDarkly\VariationOrRollout;
 
-class VariationOrRolloutTest extends \PHPUnit_Framework_TestCase
+class VariationOrRolloutTest extends \PHPUnit\Framework\TestCase
 {
     public function testUsingSeedIsDifferentThanSalt()
     {

tests/WeightedVariationTest.php

@@ -3,7 +3,7 @@
 
 use LaunchDarkly\WeightedVariation;
 
-class WeightedVariationTest extends \PHPUnit_Framework_TestCase
+class WeightedVariationTest extends \PHPUnit\Framework\TestCase
 {
     public function testWeightedVariationPropertiesAreSet()
     {