fixed code standards

Author: dmitriy

src/Command/WaitDatabaseCommand.php

@@ -38,7 +38,7 @@ public function __construct(EntityManagerInterface $em)
         parent::__construct('db:wait');
         $this->em = $em;
         $this->setDescription('Waits for database availability.')
-             ->setHelp('This command allows you to wait for database availability.');
+            ->setHelp('This command allows you to wait for database availability.');
     }
 
     /**

src/DataFixtures/AppFixtures.php

@@ -4,11 +4,11 @@
 namespace App\DataFixtures;
 
 use Doctrine\Bundle\FixturesBundle\Fixture;
-use Doctrine\Common\Persistence\ObjectManager;
+use Doctrine\Persistence\ObjectManager;
 
 class AppFixtures extends Fixture
 {
-    public function load(ObjectManager $manager)
+    public function load(ObjectManager $manager): void
     {
         // $product = new Product();
         // $manager->persist($product);

src/Migrations/Version20190222213409.php

@@ -12,12 +12,12 @@
  */
 final class Version20190222213409 extends AbstractMigration
 {
-    public function getDescription() : string
+    public function getDescription(): string
     {
         return '';
     }
 
-    public function up(Schema $schema) : void
+    public function up(Schema $schema): void
     {
         // this up() migration is auto-generated, please modify it to your needs
         $this->abortIf(
@@ -46,7 +46,7 @@ public function up(Schema $schema) : void
         $this->addSql($sql);
     }
 
-    public function down(Schema $schema) : void
+    public function down(Schema $schema): void
     {
         // this down() migration is auto-generated, please modify it to your needs
         $this->abortIf(