test: update phpunit

composer.json

@@ -8,7 +8,7 @@
         "friendsofphp/php-cs-fixer": "^2.14"
     },
     "scripts": {
-        "test": "phpunit --configuration phpunit.xml --fail-on-warning",
+        "test": "phpunit --configuration phpunit.xml",
         "cs:check": "php-cs-fixer fix --dry-run --diff",
         "cs:fix": "php-cs-fixer fix",
         "lint": "find . -name \\*.php -not -path './vendor/*' -exec php -l \"{}\" \\;"

phpunit.xml

@@ -1,17 +1,13 @@
-<phpunit bootstrap="tests/bootstrap-unit.php"
-         convertErrorsToExceptions="true"
-         convertNoticesToExceptions="true"
-         convertWarningsToExceptions="true"
-         colors="true"
->
-    <testsuites>
-        <testsuite name="unit">
-            <directory>tests/unit</directory>
-        </testsuite>
-    </testsuites>
-    <filter>
-        <whitelist processUncoveredFilesFromWhitelist="true">
-            <directory suffix=".php">lib</directory>
-        </whitelist>
-    </filter>
+<?xml version="1.0"?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" bootstrap="tests/bootstrap-unit.php" convertErrorsToExceptions="true" convertNoticesToExceptions="true" convertWarningsToExceptions="true" colors="true" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
+  <coverage processUncoveredFiles="true">
+    <include>
+      <directory suffix=".php">lib</directory>
+    </include>
+  </coverage>
+  <testsuites>
+    <testsuite name="unit">
+      <directory>tests/unit</directory>
+    </testsuite>
+  </testsuites>
 </phpunit>

tests/unit/RosterPushTest.php

@@ -97,7 +97,7 @@ class RosterPushTest extends TestCase
 			->method('createOrUpdateRosterItem')
 			->with($user3);
 
-		$resultStatement = $this->getMockBuilder('Doctrine\DBAL\Driver\ResultStatement')->getMock();
+		$resultStatement = $this->getMockBuilder('OCP\DB\IResult')->getMock();
 
 		$resultStatement->expects($this->at(0))
 			->method('fetchAll')