I suspect this wasn’t the case when this question was asked, but the Julia extension for VS Code now provides great renaming functionality, very similar to how JetBrains products’ refactor->rename command works.
I thought is was worth reviving this topic, since this page seems to be in the top search results for people wondering how to get this kind of functionality from a Julia IDE.
Also, see the following link, it appears that the Julia devs are switching from Juno to VS Code, so VS Code is probably the best option for most users at this point: Bye-bye Juno, hello Julia for VS Code - IDE shifts form, reaches 1.0 • DEVCLASS