Update readme.md

Author: vvval

readme.md

@@ -15,22 +15,27 @@ composer require vvval/exiftool-reader
 ## Example usage
 ```php
 <?php
-/**
- * @var ExiftoolReader\Reader $reader
- * @var ExiftoolReader\Result $output
- * @var ExiftoolReader\Metadata $metadata
- */
+$exiftoolConfig = new \ExiftoolReader\Config\Exiftool();
+$command = new \ExiftoolReader\Command($exiftoolConfig);
+$mapperConfig = new \ExiftoolReader\Config\Mapper();
+$utils = new \ExiftoolReader\Utils();
+
+$reader = new \ExiftoolReader\Reader($command);
+$metadata = new \ExiftoolReader\Metadata($mapperConfig, $utils);
+
+/** @var ExiftoolReader\Result $output */
 $output = $reader->read('filename');
 
 /**
  * Full metadata array.
  */
 $decoded = $output->getDecoded();
-var_dump($decoded); // ['title' => '...', 'description' => '...', ...]
+var_dump($decoded); // ['title' => '...', 'description' => '...', /* ... other fields */]
 
 /**
  * Fetched specified metadata keys.
- * Uses aliases to find values, for example Title|ObjectName, Description|Caption-Abstract|ImageDescription, etc...
+ * Uses aliases to find values,
+ * for example Title|ObjectName, Description|Caption-Abstract|ImageDescription, etc...
  */
 $fetchedData = $metadata->fetch($output, ['title', 'description']);
 var_dump($fetchedData); // ['title' => '...', 'description' => '...']