#19 - year periods (#25)

* #19 - year periods

* #19 - fix

database/factories/YearPeriodFactory.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Database\Factories;
+
+use Illuminate\Database\Eloquent\Factories\Factory;
+
+class YearPeriodFactory extends Factory
+{
+    public function definition(): array
+    {
+        return [
+            "year" => $this->faker->unique()->year,
+        ];
+    }
+}