Relax Setting::setMergePolicy value to allow int

CHANGELOG.md

@@ -6,6 +6,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased](https://github.com/ruflin/Elastica/compare/7.1.5...master)
 ### Backward Compatibility Breaks
+* Changed `Settings::setMergePolicy` signature to allow to pass `int` and `string` as argument 2, if you are overriding this method you must update the signature removing the `string` type-hint.
 ### Added
 * Added `PHPStan` at level 3 by @franmomu [#2064](https://github.com/ruflin/Elastica/pull/2064)
 * Added coverage check to CI by @franmomu [#2071](https://github.com/ruflin/Elastica/pull/2071)

src/Index/Settings.php

@@ -259,11 +259,12 @@ public function getRefreshInterval(): string
      *
      * To have this changes made the index has to be closed and reopened
      *
-     * @param string $key Merge policy key (for ex. expunge_deletes_allowed)
+     * @param string     $key   Merge policy key (for ex. expunge_deletes_allowed)
+     * @param int|string $value
      *
      * @see https://www.elastic.co/guide/en/elasticsearch/reference/current/index-modules-merge.html
      */
-    public function setMergePolicy(string $key, string $value): Response
+    public function setMergePolicy(string $key, $value): Response
     {
         $this->_index->close();
         $response = $this->set(['merge.policy.'.$key => $value]);
@@ -277,7 +278,7 @@ public function setMergePolicy(string $key, string $value): Response
      *
      * @param string $key Merge policy key (for ex. expunge_deletes_allowed)
      *
-     * @return string Refresh interval
+     * @return int|string
      *
      * @see https://www.elastic.co/guide/en/elasticsearch/reference/current/index-modules-merge.html
      */

tests/Index/SettingsTest.php

@@ -237,10 +237,10 @@ public function testSetMergePolicy(): void
         $settings = $index->getSettings();
 
         $settings->setMergePolicy('expunge_deletes_allowed', 15);
-        $this->assertEquals(15, $settings->getMergePolicy('expunge_deletes_allowed'));
+        $this->assertSame(15, $settings->getMergePolicy('expunge_deletes_allowed'));
 
         $settings->setMergePolicy('expunge_deletes_allowed', 10);
-        $this->assertEquals(10, $settings->getMergePolicy('expunge_deletes_allowed'));
+        $this->assertSame(10, $settings->getMergePolicy('expunge_deletes_allowed'));
 
         $index->delete();
     }