Add declare strict_types to seed template (cakephp#2220)

Author: MasterOdin

src/Phinx/Console/Command/SeedCreate.php

@@ -198,7 +198,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 
         $namespace = $config instanceof NamespaceAwareInterface ? $config->getSeedNamespaceByPath($path) : null;
         $classes = [
-            '$namespaceDefinition' => $namespace !== null ? ('namespace ' . $namespace . ';') : '',
+            '$namespaceDefinition' => $namespace !== null ? (PHP_EOL . 'namespace ' . $namespace . ';' . PHP_EOL) : '',
             '$namespace' => $namespace,
             '$useClassName' => $config->getSeedBaseClassName(false),
             '$className' => $className,

src/Phinx/Seed/Seed.template.php.dist

@@ -1,6 +1,7 @@
 <?php
-$namespaceDefinition
 
+declare(strict_types=1);
+$namespaceDefinition
 use $useClassName;
 
 class $className extends $baseClassName