Improve json_encode() depth test

Author: cuishuang

ext/json/tests/json_encode_depth.phpt

@@ -8,12 +8,12 @@ json_encode() rejects depth values outside the encoder range
 foreach ([2147483648, -2147483649] as $depth) {
     try {
         json_encode([], depth: $depth);
-    } catch (ValueError $e) {
-        echo $e->getMessage(), "\n";
+    } catch (Throwable $e) {
+        echo $e::class, ': ', $e->getMessage(), "\n";
     }
 }
 
 ?>
 --EXPECT--
-json_encode(): Argument #3 ($depth) must be between -2147483648 and 2147483647
-json_encode(): Argument #3 ($depth) must be between -2147483648 and 2147483647
+ValueError: json_encode(): Argument #3 ($depth) must be between -2147483648 and 2147483647
+ValueError: json_encode(): Argument #3 ($depth) must be between -2147483648 and 2147483647