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/consolidation/annotated-command/tests/src/TestTerminal.php

@@ -0,0 +1,22 @@
+<?php
+namespace Consolidation\TestUtils;
+
+class TestTerminal
+{
+    protected $width = 0;
+
+    public function __construct($width)
+    {
+        $this->width = $width;
+    }
+
+    public function getWidth()
+    {
+        return $this->width;
+    }
+
+    public function setWidth($width)
+    {
+        $this->width = $width;
+    }
+}