Fix issue with regex rule on 'threads' column, fix StyleCI issues on migration

Author: matthewpi

app/Models/Server.php

@@ -110,7 +110,7 @@ class Server extends Validable
         'swap' => 'required|numeric|min:-1',
         'io' => 'required|numeric|between:10,1000',
         'cpu' => 'required|numeric|min:0',
-        'threads' => 'sometimes|regex:/^[0-9-,]+$/',
+        'threads' => 'nullable|regex:/^[0-9-,]+$/',
         'oom_disabled' => 'sometimes|boolean',
         'disk' => 'required|numeric|min:0',
         'allocation_id' => 'required|bail|unique:servers|exists:allocations,id',

database/migrations/2020_04_03_203624_add_threads_column_to_servers_table.php

@@ -1,8 +1,8 @@
 <?php
 
-use Illuminate\Database\Migrations\Migration;
-use Illuminate\Database\Schema\Blueprint;
 use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
 
 class AddThreadsColumnToServersTable extends Migration
 {