Hi sergye,
Welcome to our forum and thanks for contacting us with your question!
The migration doesn't require any additional plugin. It is possible to upgrade directly to the targeted version. It may require some changes to the code in order to make charts work correctly, but in general we try to keep backward compatibility and if you don't use any custom plugins or you didn't make any changes to the core code, the migration process should run without any issues. In case of any we're available at your at your convenience.
Additionally you might want to take a look at the Highcharts Changelog, where you will find all information about changes made in specific versions:
https://www.highcharts.com/blog/changelog/
Feel free to ask any further questions.
Regards!