Make insert usage consistent

Author: nyamsprod

src/OrderedList.php

@@ -110,10 +110,8 @@ public function merge(self ...$others): void
 
     public function insert(
         int $index,
-        InnerList|Item|ByteSequence|Token|bool|int|float|string $element,
         InnerList|Item|ByteSequence|Token|bool|int|float|string ...$elements
     ): void {
-        array_unshift($elements, $element);
         $offset = $this->filterIndex($index);
         match (true) {
             null === $offset => throw InvalidOffset::dueToIndexNotFound($index),

src/ParametersTest.php

@@ -144,9 +144,9 @@ public function it_can_returns_the_container_element_keys(): void
      */
     public function it_can_merge_one_or_more_instances(): void
     {
-        $instance1 = new Parameters(['a' => Item::from(false)]);
-        $instance2 = new Parameters(['b' => Item::from(true)]);
-        $instance3 = new Parameters(['a' => Item::from(42)]);
+        $instance1 = new Parameters(['a' =>false]);
+        $instance2 = new Parameters(['b' => true]);
+        $instance3 = new Parameters(['a' => 42]);
 
         $instance1->merge($instance2, $instance3);