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/phpunit/phpunit-mock-objects/tests/Builder/InvocationMockerTest.php

@@ -0,0 +1,74 @@
+<?php
+/*
+ * This file is part of the phpunit-mock-objects package.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+use PHPUnit\Framework\TestCase;
+
+class InvocationMockerTest extends TestCase
+{
+    public function testWillReturnWithOneValue()
+    {
+        $mock = $this->getMockBuilder(stdClass::class)
+                     ->setMethods(['foo'])
+                     ->getMock();
+
+        $mock->expects($this->any())
+             ->method('foo')
+             ->willReturn(1);
+
+        $this->assertEquals(1, $mock->foo());
+    }
+
+    public function testWillReturnWithMultipleValues()
+    {
+        $mock = $this->getMockBuilder(stdClass::class)
+                     ->setMethods(['foo'])
+                     ->getMock();
+
+        $mock->expects($this->any())
+             ->method('foo')
+             ->willReturn(1, 2, 3);
+
+        $this->assertEquals(1, $mock->foo());
+        $this->assertEquals(2, $mock->foo());
+        $this->assertEquals(3, $mock->foo());
+    }
+
+    public function testWillReturnOnConsecutiveCalls()
+    {
+        $mock = $this->getMockBuilder(stdClass::class)
+                     ->setMethods(['foo'])
+                     ->getMock();
+
+        $mock->expects($this->any())
+             ->method('foo')
+             ->willReturnOnConsecutiveCalls(1, 2, 3);
+
+        $this->assertEquals(1, $mock->foo());
+        $this->assertEquals(2, $mock->foo());
+        $this->assertEquals(3, $mock->foo());
+    }
+
+    public function testWillReturnByReference()
+    {
+        $mock = $this->getMockBuilder(stdClass::class)
+                     ->setMethods(['foo'])
+                     ->getMock();
+
+        $mock->expects($this->any())
+             ->method('foo')
+             ->willReturnReference($value);
+
+        $this->assertSame(null, $mock->foo());
+        $value = 'foo';
+        $this->assertSame('foo', $mock->foo());
+        $value = 'bar';
+        $this->assertSame('bar', $mock->foo());
+    }
+}