[Config] Add missing json_encode flag when creating .meta.json files

Author: nicolas-grekas

ResourceCheckerConfigCache.php

@@ -128,7 +128,7 @@ public function write(string $content, ?array $metadata = null): void
             $ser = preg_replace_callback('/;O:(\d+):"/', static fn ($m) => ';O:'.(9 + $m[1]).':"Tracking\\', $ser);
             $ser = preg_replace_callback('/s:(\d+):"\0[^\0]++\0/', static fn ($m) => 's:'.($m[1] - \strlen($m[0]) + 6).':"', $ser);
             $ser = unserialize($ser);
-            $ser = @json_encode($ser) ?: [];
+            $ser = @json_encode($ser, \JSON_UNESCAPED_SLASHES | \JSON_UNESCAPED_UNICODE) ?: [];
             $ser = str_replace('"__PHP_Incomplete_Class_Name":"Tracking\\\\', '"@type":"', $ser);
             $ser = \sprintf('{"resources":%s}', $ser);
 

Tests/ResourceCheckerConfigCacheTest.php

@@ -168,6 +168,6 @@ public function testCacheWithCustomMetaFile()
                     'resource' => __FILE__,
                 ],
             ],
-        ]));
+        ], \JSON_UNESCAPED_SLASHES | \JSON_UNESCAPED_UNICODE));
     }
 }