Make PHPUnit run on PHP 7.2

fix PHPUnit at 4.8.34 as the next version breaks our compatibility
Layer:
a55235c033

composer.json

@@ -81,7 +81,7 @@
         "bower-asset/yii2-pjax": "~2.0.1"
     },
     "require-dev": {
-        "phpunit/phpunit": "~4.4",
+        "phpunit/phpunit": "4.8.34",
         "cebe/indent": "~1.0.2",
         "friendsofphp/php-cs-fixer": "~2.2.3"
     },

tests/compatibility.php

@@ -19,6 +19,9 @@ namespace PHPUnit\Framework\Constraint {
 
 namespace PHPUnit\Framework {
     if (!class_exists('PHPUnit\Framework\TestCase') && class_exists('PHPUnit_Framework_TestCase')) {
+
+        echo "Applying compatibility patch for PHPUnit 6...\n";
+
         abstract class TestCase extends \PHPUnit_Framework_TestCase
         {
             /**

tests/framework/test/ActiveFixtureTest.php

@@ -50,6 +50,7 @@ class MyDbTestCase
 
 /**
  * @group fixture
+ * @group db
  */
 class ActiveFixtureTest extends DatabaseTestCase
 {