beforeExit hook not present in ep-mobx-router

Question

I am using ep-mobx-router v0.2.3 in a react typescript project, which is very similar to mobx-router. The documentation page shows that beforeExit is a hook present in the package, but when I am trying to use it, it gives error that its not present in ep-mobx-router. I checked in my route.ts file in node modules of ep-mobx-router, only onEnter is present there. What am I doing wrong? How can I use beforeExit with minimal changes to project? I have tried moving to mobx-router, but facing so many dependencies issues.