Update guava to 30.1

[Breee]

There is a security alert for guava, everything below 24.1.1 contains a vulnerability
i.e. GHSA-mvr2-9pj6-7w5j

I propose to update the version directly to the latest release or at least 24.1.1.

This affects the fortify plugin. Can someone make sure, that this update does not break it?

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[bradeac]

The dependency version update looks fine by me, but I'm not the right person to approve this merge request because there's no way I can test the fortify plugin.
@Dutzu can you reach out to the guys who are still maintaining this ? Also mentioning @markus2810