[Intl] fix return type declarations
MODIFY
DateFormatter/IntlDateFormatter.php
DateFormatter/IntlDateFormatter.php
@@ -415,7 +415,7 @@ class IntlDateFormatter
* contain -1 otherwise it will contain the position at which parsing
* ended. If $parse_pos > strlen($value), the parse fails immediately.
*
- * @return int Parsed value as a timestamp
+ * @return int|false Parsed value as a timestamp
*
* @see https://php.net/intldateformatter.parse
*

[Intl] fix return type declarations