Update pumps configuration interface

src/Library/Benzina/Pump/AbstractPump.php

@@ -4,9 +4,9 @@ namespace App\Library\Benzina\Pump;
 
 abstract class AbstractPump implements PumpInterface
 {
-    protected ?array $config;
+    protected array $config;
 
-    public function configure(?array $config = null): void
+    public function configure(array $config = []): void
     {
         $this->config = $config;
     }

src/Library/Benzina/Pump/PumpInterface.php

@@ -15,10 +15,10 @@ interface PumpInterface
     /**
      * Sets flexible configuration values for this pump.
      * 
-     * @param array|null $data The configuration array.
+     * @param array $config The configuration array.
      * @return void
      */
-    public function configure(?array $config = null): void;
+    public function configure(array $config = []): void;
 
     /**
      * Process the data to be pumped.