up to 5.2.25 (August 28th 2017)

up to 5.2.25 (August 28th 2017)

- Make obtaining SMTP transaction ID more reliable
- Add Bosnian translation

This is the last official release in the legacy PHPMailer 5.2 series;

there may be future security patches (which will be found in the
[5.2-stable branch](https://github.com/PHPMailer/PHPMailer/tree/5.2-stable)),
but no further non-security PRs or issues will be accepted.

Migrate to PHPMailer 6.0.