Make persistQueryClient stable

[TkDodo]

by moving it out of the experimental stage.

Also, as suggested, rename persistor to persister. see this stackexchange

[prateek3255]

I would like to take this one up

[TkDodo]

@all-contributors please add @prateek3255 for code

[allcontributors]

@TkDodo

I've put up a pull request to add @prateek3255! 🎉