Added dependencies into the configurator attribute

Author: sebprt

src/Service.php

@@ -11,11 +11,15 @@
 
 #[Configurator\Pipeline(
     name: 'spreadsheet',
+    dependencies: [
+        'php-etl/spreadsheet-flow:"*"'
+    ],
     steps: [
         new Configurator\Pipeline\StepExtractor(),
         new Configurator\Pipeline\StepLoader(),
     ],
-)] final readonly class Service implements Configurator\PipelinePluginInterface
+)]
+final readonly class Service implements Configurator\PipelinePluginInterface
 {
     private Processor $processor;
     private Configurator\PluginConfigurationInterface $configuration;