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/phar-io/manifest/tests/xml/ComponentElementTest.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace PharIo\Manifest;
+
+class ComponentElementTest extends \PHPUnit_Framework_TestCase {
+    /**
+     * @var ComponentElement
+     */
+    private $component;
+
+    protected function setUp() {
+        $dom = new \DOMDocument();
+        $dom->loadXML('<?xml version="1.0" ?><component xmlns="https://phar.io/xml/manifest/1.0" name="phar-io/phive" version="0.6.0" />');
+        $this->component = new ComponentElement($dom->documentElement);
+    }
+
+    public function testNameCanBeRetrieved() {
+        $this->assertEquals('phar-io/phive', $this->component->getName());
+    }
+
+    public function testEmailCanBeRetrieved() {
+        $this->assertEquals('0.6.0', $this->component->getVersion());
+    }
+
+}