Update tests/Cache/CachingResultTest.php

Co-authored-by: Grégoire Paris <[email protected]>

Author: k0ka

tests/Cache/CachingResultTest.php

@@ -40,7 +40,7 @@ protected function setUp(): void
         $this->cache = $this->createMock(Cache::class);
         $this->cache->expects(self::exactly(1))
             ->method('save')
-            ->willReturnCallback(function ($id, $data, $ttl): void {
+            ->willReturnCallback(function (string $id, $data, int $ttl): void {
                 $this->assertEquals($this->cacheKey, $id, 'The cache key should match the given one');
                 $this->assertEquals($this->lifetime, $ttl, 'The cache key ttl should match the given one');
                 $this->cachedData = $data;