Add pear modules, mail and net_smtp via composer (#93)

Add pear modules, mail and net_smtp via composer, remove php 5.6 build due to phpunit 6

lib/composer/vendor/symfony/process/Tests/ProcessUtilsTest.php

@@ -11,9 +11,13 @@
 
 namespace Symfony\Component\Process\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Process\ProcessUtils;
 
-class ProcessUtilsTest extends \PHPUnit_Framework_TestCase
+/**
+ * @group legacy
+ */
+class ProcessUtilsTest extends TestCase
 {
     /**
      * @dataProvider dataArguments
@@ -43,6 +47,7 @@ class ProcessUtilsTest extends \PHPUnit_Framework_TestCase
             array("'<|>\" \"'\\''f'", '<|>" "\'f'),
             array("''", ''),
             array("'with\\trailingbs\\'", 'with\trailingbs\\'),
+            array("'withNonAsciiAccentLikeéÉèÈàÀöä'", 'withNonAsciiAccentLikeéÉèÈàÀöä'),
         );
     }
 }