added FTP support to storage providers (#58)

* added FTP support to storage providers

* build and code style fix

tests/Feature/SSHCommands/Storage/UploadToFTPCommandTest.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace Tests\Feature\SSHCommands\Storage;
+
+use App\SSHCommands\Storage\UploadToFTPCommand;
+use Tests\TestCase;
+
+class UploadToFTPCommandTest extends TestCase
+{
+    public function test_generate_command()
+    {
+        $command = new UploadToFTPCommand(
+            'src',
+            'dest',
+            '1.1.1.1',
+            '21',
+            'username',
+            'password',
+            true,
+            true
+        );
+
+        $expected = <<<'EOD'
+        curl --ftp-pasv -T "src" -u "username:password" ftps://1.1.1.1:21/dest
+        EOD;
+
+        $this->assertStringContainsString($expected, $command->content());
+    }
+}