Fix deprecated messages

phpunit.xml.dist

@@ -1,14 +1,13 @@
 <?xml version="1.0" encoding="utf-8"?>
-
-<phpunit colors="true" strict="true" bootstrap="vendor/autoload.php">
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" colors="true" bootstrap="vendor/autoload.php" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
+  <coverage>
+    <include>
+      <directory suffix=".php">./src/</directory>
+    </include>
+  </coverage>
   <testsuites>
     <testsuite name="phpDocumentor\Reflection\DocBlock">
       <directory>./tests/</directory>
     </testsuite>
   </testsuites>
-  <filter>
-    <whitelist>
-        <directory suffix=".php">./src/</directory>
-    </whitelist>
-  </filter>
 </phpunit>

src/Barryvdh/Reflection/DocBlock/Description.php

@@ -109,7 +109,7 @@ class Description implements \Reflector
                     )
                 \}/Sux',
                 $this->contents,
-                null,
+                -1,
                 PREG_SPLIT_DELIM_CAPTURE
             );