Added millibar as pressure unit

src/UnitConverter/Unit/Pressure/Millibar.php

@@ -0,0 +1,36 @@
+<?php
+
+/**
+ * This file is part of the jordanbrauer/unit-converter PHP package.
+ *
+ * @copyright 2017 Jordan Brauer <[email protected]>
+ * @license MIT
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types = 1);
+
+namespace UnitConverter\Unit\Pressure;
+
+/**
+ * Millibar unit data class.
+ *
+ * @version 1.0.0
+ * @since 1.0.0
+ * @author Teun Willems
+ */
+class Millibar extends PressureUnit
+{
+    protected function configure () : void
+    {
+        $this
+            ->setName("bar")
+
+            ->setSymbol("mbar")
+
+            ->setUnits(1)
+        ;
+    }
+}