Rector standards slowly being applied. PHP Version first.

rector.php

@@ -0,0 +1,19 @@
+<?php
+
+declare(strict_types=1);
+
+use Rector\Config\RectorConfig;
+use Rector\TypeDeclaration\Rector\ClassMethod\AddVoidReturnTypeWhereNoReturnRector;
+
+return RectorConfig::configure()
+    ->withPaths([
+        __DIR__ . '/benchmark',
+        __DIR__ . '/examples',
+        __DIR__ . '/src',
+        __DIR__ . '/tests',
+    ])
+    // uncomment to reach your current PHP version
+    ->withPhpSets()
+    ->withRules([
+        AddVoidReturnTypeWhereNoReturnRector::class,
+    ]);