fix: ReductionIterableAggreate must yield the initial value first

src/ReductionIterableAggregate.php

@@ -42,18 +42,12 @@ public function __construct(private iterable $iterable, Closure $closure, privat
      */
     public function getIterator(): Generator
     {
-        $isEmpty = true;
-        $initial = $this->initial;
+        yield $initial = $this->initial;
 
         foreach ($this->iterable as $key => $value) {
-            $isEmpty = false;
             $initial = ($this->closure)($initial, $value, $key, $this->iterable);
 
             yield $key => $initial;
         }
-
-        if (true === $isEmpty) {
-            yield $initial;
-        }
     }
 }