`validateCustomClaims` only runs once and then returns the same result for every other attempted call even when checking different claims (security flaw or am I using it wrong?)

### Version info

**React:** 17.0.1

**Firebase:** 9.6.1

**ReactFire:** 4.2.1

### Steps to reproduce

use `useSigninCheck` with `validateCustomClaims` at some point in the component tree and then try to use it again later on with different custom claims

### Expected behavior

I should be able to pass different custom claims during different calls to show/hide different parts of the UI. `validateCustomClaims` should run every time I use it and return the appropriate result. For example, if I want to show some components to "admin" users and some other components to "superadmin" users.

### Actual behavior

`validateCustomClaims` only runs the first time you call it and on subsequent calls just returns the same `hasRequiredClaims` result from the initial run. This seems to be a major security flaw especially if you aren't aware that it's doing this.

### Test case

The sandbox below calls `validateCustomClaims` in the `` component and returns a hardcoded `true` result... Later in the `` it tries to validate that the user has `superadmin` claim and returns `true` even though it does not have the claim. Additionally, the `validateCustomClaims` function is not even run in this call as there is no `console.log` for it.

If you switch the `validateCustomClaims` check in the `` component to use the `requiredClaims` method then the custom validator does run in the `` component.

Lastly, using the `requiredClaims` property method to check for `superadmin` instead of a custom validator returns the appropriate result no matter where it is used. I would assume both methods should always return an accurate result no matter where they are used in the tree.

https://codesandbox.io/s/usesignincheckissue-xqwm4u?file=/src/App.js

Start with the linked CodeSandbox, especially App and ComponentForSuperadminOnly, then read the useSigninCheck entry point and compare validateCustomClaims with requiredClaims. Confirm how different claim checks are handled across calls; done means admin and superadmin checks each return their appropriate result rather than reusing the first result.

Written by the indexing model from the issue text.