Merge branch '7.3' into 7.4

* 7.3:
  [Mailer][MailJet] Fix forbidden headers case-sensitive comparison
  do not cast too big floats to int
  [Scheduler] Don’t get next run date from `null`
  [JsonPath] Add @alexandre-daubois as code owner
  do not pass more than one byte to ord()

Author: fabpot

Tokenizer/JsonPathTokenizer.php

@@ -88,9 +88,8 @@ public static function tokenize(JsonPath $query): array
             if ($inQuote) {
                 // literal control characters (U+0000 through U+001F) in quoted strings
                 // are not be allowed unless they are part of escape sequences
-                $ord = \ord($char);
                 if ($inBracket) {
-                    if ($ord <= 31) {
+                    if (\ord($char[0]) <= 31) {
                         if (!self::isEscaped($chars, $i)) {
                             throw new InvalidJsonPathException('control characters are not allowed in quoted strings.', $position);
                         }