Merge branch '5.4' into 6.0

* 5.4:
  [Process] intersect with getenv() in case-insensitive manner to get default envs
  [Serializer] fix support for lazy/unset properties
  Fix redundant type casts
  [Notifier] Fix AllMySms bridge body content
  Revert "[DoctrineBridge] add support for the JSON type"

Inline.php

@@ -637,7 +637,7 @@ private static function evaluateScalar(string $scalar, int $flags, array &$refer
             // no break
             case \in_array($scalar[0], ['+', '-', '.'], true) || is_numeric($scalar[0]):
                 if (Parser::preg_match('{^[+-]?[0-9][0-9_]*$}', $scalar)) {
-                    $scalar = str_replace('_', '', (string) $scalar);
+                    $scalar = str_replace('_', '', $scalar);
                 }
 
                 switch (true) {