Sentry release changes

Hi all,
I’ve question regarding release changes of new sentry versions. I want to know about new features and bugfixes which are avaiable in newest version. It will give us leverage during the planning and make our decisions easier is it worth to spend time on update or not.
Where could I find what was changed in particular release?
I look for it in github but I have seen only information "* No documented changes. "

You do great job thanks!