Update author information

- Changed author name to Taber
- Confirmed email as taber@shopkeeper.dev

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

composer.json

@@ -15,5 +15,11 @@
             "Shopkeeper\\PDFingPO\\": ""
         },
         "files": ["registration.php"]
-    }
+    },
+    "authors": [
+        {
+            "name": "Taber",
+            "email": "taber@shopkeeper.dev"
+        }
+    ]
 }