refactorings of pirep/acars api calls; separate field calls

app/Http/Requests/Acars/FieldsRequest.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace App\Http\Requests\Acars;
+
+use App\Interfaces\FormRequest;
+
+/**
+ * Class PrefileRequest
+ * @package App\Http\Requests\Acars
+ */
+class FieldsRequest extends FormRequest
+{
+    /**
+     * @return array
+     */
+    public function rules()
+    {
+        return [
+            'fields' => 'required|array',
+        ];
+    }
+}