Update PHPUnit config

phpunit.xml

 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit backupGlobals="false"
-         backupStaticAttributes="false"
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="./vendor/phpunit/phpunit/phpunit.xsd"
          bootstrap="vendor/autoload.php"
          colors="true"
-         convertErrorsToExceptions="true"
-         convertNoticesToExceptions="true"
-         convertWarningsToExceptions="true"
-         processIsolation="false"
-         stopOnFailure="false">
+>
     <testsuites>
         <testsuite name="Unit">
             <directory suffix="Test.php">./tests/Unit</directory>
         </testsuite>
-
         <testsuite name="Feature">
             <directory suffix="Test.php">./tests/Feature</directory>
         </testsuite>
@@ -26,10 +21,10 @@
         <server name="APP_ENV" value="testing"/>
         <server name="BCRYPT_ROUNDS" value="4"/>
         <server name="CACHE_DRIVER" value="array"/>
-        <server name="MAIL_DRIVER" value="array"/>
+        <server name="DB_DATABASE" value=":memory:"/>
+        <server name="MAIL_MAILER" value="array"/>
         <server name="QUEUE_CONNECTION" value="sync"/>
         <server name="SESSION_DRIVER" value="array"/>
-        <server name="DB_CONNECTION" value="sqlite"/>
-        <server name="DB_DATABASE" value=":memory:"/>
+        <server name="TELESCOPE_ENABLED" value="false"/>
     </php>
 </phpunit>