Code cleanup.

app/Support/Binder/DynamicConfigKey.php

@@ -19,6 +19,8 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
+declare(strict_types=1);
+
 namespace FireflyIII\Support\Binder;
 
 use Illuminate\Routing\Route;
@@ -51,4 +53,4 @@ class DynamicConfigKey
         throw new NotFoundHttpException;
     }
 
-}
+}