Revert "Update PHPUnit configuration"

This reverts commit 866a71a.

phpunit.xml

@@ -3,22 +3,19 @@
          xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
          cacheDirectory=".phpunit.cache"
          executionOrder="depends,defects"
-         shortenArraysForExportThreshold="10"
          requireCoverageMetadata="true"
          beStrictAboutCoverageMetadata="true"
          beStrictAboutOutputDuringTests="true"
-         displayDetailsOnPhpunitDeprecations="true"
-         failOnPhpunitDeprecation="true"
          failOnRisky="true"
          failOnWarning="true"
          colors="true">
     <testsuites>
-        <testsuite name="unit">
+        <testsuite name="default">
             <directory>tests/unit</directory>
         </testsuite>
     </testsuites>
 
-    <source ignoreIndirectDeprecations="true" restrictNotices="true" restrictWarnings="true">
+    <source>
         <include>
             <directory>src</directory>
         </include>