style: Adopt PSR12

Dev dependency flyeralarm/php-code-validator has been removed.

Closes #444

Structural/Adapter/Book.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Adapter;
 

Structural/Adapter/EBook.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Adapter;
 

Structural/Adapter/EBookAdapter.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Adapter;
 

Structural/Adapter/Kindle.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Adapter;
 

Structural/Adapter/PaperBook.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Adapter;
 

Structural/Adapter/Tests/AdapterTest.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Adapter\Tests;
 

Structural/Bridge/Formatter.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Bridge;
 

Structural/Bridge/HelloWorldService.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Bridge;
 

Structural/Bridge/HtmlFormatter.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Bridge;
 

Structural/Bridge/PingService.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Bridge;
 

Structural/Bridge/PlainTextFormatter.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Bridge;
 

Structural/Bridge/Service.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Bridge;
 

Structural/Bridge/Tests/BridgeTest.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Bridge\Tests;
 

Structural/Composite/Form.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Composite;
 

Structural/Composite/InputElement.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Composite;
 

Structural/Composite/Renderable.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Composite;
 

Structural/Composite/Tests/CompositeTest.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Composite\Tests;
 

Structural/Composite/TextElement.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Composite;
 

Structural/DataMapper/StorageAdapter.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\DataMapper;
 

Structural/DataMapper/Tests/DataMapperTest.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\DataMapper\Tests;
 

Structural/DataMapper/User.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\DataMapper;
 

Structural/DataMapper/UserMapper.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\DataMapper;
 

Structural/Decorator/Booking.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Decorator;
 

Structural/Decorator/BookingDecorator.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Decorator;
 

Structural/Decorator/DoubleRoomBooking.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Decorator;
 

Structural/Decorator/ExtraBed.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Decorator;
 

Structural/Decorator/Tests/DecoratorTest.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Decorator\Tests;
 

Structural/Decorator/WiFi.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Decorator;
 

Structural/DependencyInjection/DatabaseConfiguration.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\DependencyInjection;
 

Structural/DependencyInjection/DatabaseConnection.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\DependencyInjection;
 

Structural/DependencyInjection/Tests/DependencyInjectionTest.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\DependencyInjection\Tests;
 

Structural/Facade/Bios.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Facade;
 

Structural/Facade/Facade.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Facade;
 

Structural/Facade/OperatingSystem.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Facade;
 

Structural/Facade/Tests/FacadeTest.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Facade\Tests;
 

Structural/FluentInterface/Sql.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\FluentInterface;
 
@@ -17,7 +19,7 @@ class Sql implements \Stringable
 
     public function from(string $table, string $alias): Sql
     {
-        $this->from[] = $table.' AS '.$alias;
+        $this->from[] = $table . ' AS ' . $alias;
 
         return $this;
     }

Structural/FluentInterface/Tests/FluentInterfaceTest.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\FluentInterface\Tests;
 

Structural/Flyweight/Character.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Flyweight;
 

Structural/Flyweight/Tests/FlyweightTest.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Flyweight\Tests;
 

Structural/Flyweight/Text.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Flyweight;
 

Structural/Flyweight/TextFactory.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Flyweight;
 

Structural/Proxy/BankAccount.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Proxy;
 

Structural/Proxy/BankAccountProxy.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Proxy;
 

Structural/Proxy/HeavyBankAccount.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Proxy;
 

Structural/Proxy/Tests/ProxyTest.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Proxy\Tests;
 

Structural/Registry/Registry.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Registry;
 
@@ -6,7 +8,7 @@ use InvalidArgumentException;
 
 abstract class Registry
 {
-    const LOGGER = 'logger';
+    public const LOGGER = 'logger';
 
     /**
      * this introduces global state in your application which can not be mocked up for testing

Structural/Registry/Tests/RegistryTest.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace DesignPatterns\Structural\Registry\Tests;