Disable introspection

[alimoli]

As for security, I think a simple feature to disable schema introspection should have high priority in this library.
I think we have already some PRs and suggestions from "issues" on how to approach it.
Is it something are you going to integrate/merge?
Honestly, I thank you so much for this project, but as already raised from other developers, this project seems dead.
Many good PRs never merged, nor evaluated.