refac: fix self deprecation mb_convert_encoding

Author: gimler

Tests/Functional/Controller/EditInPlaceTest.php

@@ -40,7 +40,7 @@ public function testActivatedTest(): void
         self::assertStringContainsString('<!-- TranslationBundle -->', $response->getContent());
 
         $dom = new \DOMDocument('1.0', 'utf-8');
-        @$dom->loadHTML(mb_convert_encoding($response->getContent(), 'HTML-ENTITIES', 'UTF-8'));
+        @$dom->loadHTML(mb_encode_numericentity($response->getContent(), [0x80, 0x10FFFF, 0, ~0], 'UTF-8'));
         $xpath = new \DOMXPath($dom);
 
         // Check number of x-trans tags
@@ -79,7 +79,7 @@ public function testIfUntranslatableLabelGetsDisabled(): void
         self::assertStringContainsString('<!-- TranslationBundle -->', $response->getContent());
 
         $dom = new \DOMDocument('1.0', 'utf-8');
-        @$dom->loadHTML(mb_convert_encoding($response->getContent(), 'HTML-ENTITIES', 'UTF-8'));
+        @$dom->loadHTML(mb_encode_numericentity($response->getContent(), [0x80, 0x10FFFF, 0, ~0], 'UTF-8'));
         $xpath = new \DOMXPath($dom);
 
         // Check number of x-trans tags

phpunit.xml.dist

@@ -11,7 +11,7 @@
   </coverage>
   <php>
     <env name="ENV" value="test"/>
-    <env name="SYMFONY_DEPRECATIONS_HELPER" value="max[direct]=83&amp;max[self]=1&amp;verbose=1"/>
+    <env name="SYMFONY_DEPRECATIONS_HELPER" value="max[direct]=83&amp;verbose=1"/>
     <env name="KERNEL_CLASS" value="Nyholm\BundleTest\TestKernel"/>
   </php>
   <listeners>