Fix Implicit conversion loses precision (#42)

Author: godruoyi

src/FileLockResolver.php

@@ -225,7 +225,8 @@ public function fnv(string $str): float
 
         for ($i = 0; $i < strlen($str); $i++) {
             $hash ^= ord($str[$i]);
-            $hash *= 16777619;
+            $hash *= 0x01000193;
+            $hash &= 0xFFFFFFFF;
         }
 
         return $hash;

tests/FileLockResolverTest.php

@@ -216,8 +216,8 @@ public function test_update_contents_with_content()
     public function test_fnv()
     {
         $resolver = new FileLockResolver;
-        $a = $resolver->fnv('1');
-        $b = $resolver->fnv(1);
+        $a = $resolver->fnv('1674128900558');
+        $b = $resolver->fnv(1674128900558);
 
         $this->assertEquals($a, $b);
     }