fix missing coverage

Author: spawnia

tests/Rules/UseSafeFunctionsRule/unsafe.php

@@ -1,3 +1,5 @@
 <?php
 
 fopen('foobar', 'r');
+json_decode("{}", flags: JSON_INVALID_UTF8_IGNORE);
+json_encode([], flags: JSON_FORCE_OBJECT);

tests/Rules/UseSafeFunctionsRuleTest.php

@@ -22,6 +22,14 @@ public function testUnsafe(): void
                 "Function fopen is unsafe to use. It can return FALSE instead of throwing an exception. Please add 'use function Safe\\fopen;' at the beginning of the file to use the variant provided by the 'thecodingmachine/safe' library.",
                 3,
             ],
+            [
+                "Function json_decode is unsafe to use. It can return FALSE instead of throwing an exception. Please add 'use function Safe\\json_decode;' at the beginning of the file to use the variant provided by the 'thecodingmachine/safe' library.",
+                4,
+            ],
+            [
+                "Function json_encode is unsafe to use. It can return FALSE instead of throwing an exception. Please add 'use function Safe\\json_encode;' at the beginning of the file to use the variant provided by the 'thecodingmachine/safe' library.",
+                5,
+            ],
         ]);
     }