fix: ssr issue, move fns inside useEffect

[awareness481]

Description

The hook as is is not SSR safe (repro: https://ck29z6-3000.csb.app/ ). The timestamp is initialized on the server and on the client as Date.now() so it's guaranteed to cause a hydration issue when .timestamp is used on the DOM (unless the client's clock is behind and by chance it happens to be the same during client rendering).

Additionally, there's no point in initializing .timestamp as it arguably should only be initialized/set by the geolocation events.

Additional changes include: moving the functions inside useEffect so they're not needed in the deps array, removing mounted as it's a useless check.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as before)

Checklist

• Read the Contributing Guide
• Perform a code self-review
• Comment the code, particularly in hard-to-understand areas
• Add documentation
• Add hook's story at Storybook
• Cover changes with tests
• Ensure the test suite passes (yarn test)
• Provide 100% tests coverage
• Make sure code lints (yarn lint). Fix it with yarn lint:fix in case of failure.
• Make sure types are fine (yarn lint:types).

[awareness481]

Ideally, options should be added in the deps array but the changes the behavior of the hook