chore: update phpunit config

Author: smarcet

phpunit.xml

@@ -1,14 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit backupGlobals="false"
-         backupStaticAttributes="false"
          bootstrap="./bootstrap/autoload.php"
          colors="true"
-         convertErrorsToExceptions="true"
-         convertNoticesToExceptions="true"
-         convertWarningsToExceptions="true"
          processIsolation="false"
          stopOnFailure="false"
-         syntaxCheck="false"
         >
     <testsuites>
         <testsuite name="Application Test Suite">