Fix typos

Author: bu4ak

src/array_functions.php

@@ -111,7 +111,7 @@ function array_split_filter(array $array, callable $callback)
  * @param array $array
  * @param int   $numberOfPieces
  * @param bool  $preserveKeys
- * @throws \InvalidArgumentException if the provided argument $numberOfPieces is lower then 1
+ * @throws \InvalidArgumentException if the provided argument $numberOfPieces is lower than 1
  *
  * @return array
  */

tests/ArraySplitTest.php

@@ -19,7 +19,7 @@ public function it_can_handle_an_empty_array()
      * @dataProvider argumentsProvider
      * @test
      */
-    public function it_throws_exception_when_second_parameter_is_lower_then_1($numberOfPieces, $mustThrow)
+    public function it_throws_exception_when_second_parameter_is_lower_than_1($numberOfPieces, $mustThrow)
     {
         $exception = null;
         try {