Fixed a bug in composer.json when trying to override default options …

…like required php version (#305)

src/File/Composer.php

@@ -91,7 +91,7 @@ protected function addAutoloadToComposerJson(array &$content): Composer
 
     protected function addComposerSettings(array &$content): Composer
     {
-        $content = array_merge_recursive($content, $this->getGenerator()->getOptionComposerSettings());
+        $content = array_replace_recursive($content, $this->getGenerator()->getOptionComposerSettings());
 
         return $this;
     }