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/console/Helper/TableStyle.php

@@ -37,7 +37,7 @@ class TableStyle
      *
      * @param string $paddingChar
      *
-     * @return TableStyle
+     * @return $this
      */
     public function setPaddingChar($paddingChar)
     {
@@ -65,7 +65,7 @@ class TableStyle
      *
      * @param string $horizontalBorderChar
      *
-     * @return TableStyle
+     * @return $this
      */
     public function setHorizontalBorderChar($horizontalBorderChar)
     {
@@ -89,7 +89,7 @@ class TableStyle
      *
      * @param string $verticalBorderChar
      *
-     * @return TableStyle
+     * @return $this
      */
     public function setVerticalBorderChar($verticalBorderChar)
     {
@@ -113,7 +113,7 @@ class TableStyle
      *
      * @param string $crossingChar
      *
-     * @return TableStyle
+     * @return $this
      */
     public function setCrossingChar($crossingChar)
     {
@@ -137,7 +137,7 @@ class TableStyle
      *
      * @param string $cellHeaderFormat
      *
-     * @return TableStyle
+     * @return $this
      */
     public function setCellHeaderFormat($cellHeaderFormat)
     {
@@ -161,7 +161,7 @@ class TableStyle
      *
      * @param string $cellRowFormat
      *
-     * @return TableStyle
+     * @return $this
      */
     public function setCellRowFormat($cellRowFormat)
     {
@@ -185,7 +185,7 @@ class TableStyle
      *
      * @param string $cellRowContentFormat
      *
-     * @return TableStyle
+     * @return $this
      */
     public function setCellRowContentFormat($cellRowContentFormat)
     {
@@ -209,7 +209,7 @@ class TableStyle
      *
      * @param string $borderFormat
      *
-     * @return TableStyle
+     * @return $this
      */
     public function setBorderFormat($borderFormat)
     {
@@ -233,7 +233,7 @@ class TableStyle
      *
      * @param int $padType STR_PAD_*
      *
-     * @return TableStyle
+     * @return $this
      */
     public function setPadType($padType)
     {