Move files in typical src and tests folder (#242)

* Move files in typical src and tests folder

* Fix psalm error

src/Validation/MultipleErrors.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace Egulias\EmailValidator\Validation;
+
+use Egulias\EmailValidator\Exception\InvalidEmail;
+
+class MultipleErrors extends InvalidEmail
+{
+    const CODE = 999;
+    const REASON = "Accumulated errors for multiple validations";
+    /**
+     * @var InvalidEmail[]
+     */
+    private $errors = [];
+
+    /**
+     * @param InvalidEmail[] $errors
+     */
+    public function __construct(array $errors)
+    {
+        $this->errors = $errors;
+        parent::__construct();
+    }
+
+    /**
+     * @return InvalidEmail[]
+     */
+    public function getErrors()
+    {
+        return $this->errors;
+    }
+}