Update to PHPUnit 8.5 (#15581)

* use latest phpunit/phpunit ~8.5

* submodule updates

* fixes

3 files changed, 6 insertions, 6 deletions

diff --git a/plugins/ExamplePlugin/tests/Fixtures/SimpleFixtureTrackFewVisits.php b/plugins/ExamplePlugin/tests/Fixtures/SimpleFixtureTrackFewVisits.php
index 89d99a7005..2d157a44e4 100644
--- a/plugins/ExamplePlugin/tests/Fixtures/SimpleFixtureTrackFewVisits.php
+++ b/plugins/ExamplePlugin/tests/Fixtures/SimpleFixtureTrackFewVisits.php
@@ -20,14 +20,14 @@ class SimpleFixtureTrackFewVisits extends Fixture
     public $dateTime = '2013-01-23 01:23:45';
     public $idSite = 1;
 
-    public function setUp()
+    public function setUp(): void
     {
         $this->setUpWebsite();
         $this->trackFirstVisit();
         $this->trackSecondVisit();
     }
 
-    public function tearDown()
+    public function tearDown(): void
     {
         // empty
     }
diff --git a/plugins/ExamplePlugin/tests/Integration/SimpleTest.php b/plugins/ExamplePlugin/tests/Integration/SimpleTest.php
index 1ccc775838..1612e30d6b 100644
--- a/plugins/ExamplePlugin/tests/Integration/SimpleTest.php
+++ b/plugins/ExamplePlugin/tests/Integration/SimpleTest.php
@@ -18,14 +18,14 @@ use Piwik\Tests\Framework\TestCase\IntegrationTestCase;
 class SimpleTest extends IntegrationTestCase
 {
 
-    public function setUp()
+    public function setUp(): void
     {
         parent::setUp();
 
         // set up your test here if needed
     }
 
-    public function tearDown()
+    public function tearDown(): void
     {
         // clean up your test here if needed
 
diff --git a/plugins/ExamplePlugin/tests/Unit/SimpleTest.php b/plugins/ExamplePlugin/tests/Unit/SimpleTest.php
index 791d5704f6..0369d0316c 100644
--- a/plugins/ExamplePlugin/tests/Unit/SimpleTest.php
+++ b/plugins/ExamplePlugin/tests/Unit/SimpleTest.php
@@ -15,12 +15,12 @@ namespace Piwik\Plugins\ExamplePlugin\tests\Unit;
  */
 class SimpleTest extends \PHPUnit\Framework\TestCase
 {
-    public function setUp()
+    public function setUp(): void
     {
         // set up here if needed
     }
     
-    public function tearDown()
+    public function tearDown(): void
     {
         // tear down here if needed
     }