Update example app

[kmjennison]

• Update all dependencies, but pinning Firebase at 9.16.0 due to bug #614.
• Use Node 18 for builds

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Name	Status	Preview	Comments	Updated (UTC)
nfa-example	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 28, 2023 3:31pm

[codecov[bot]]

Codecov Report

Patch and project coverage have no change.

Comparison is base (c2507b5) 99.25% compared to head (162a017) 99.25%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## v1.x #648 +/- ## ======================================= Coverage 99.25% 99.25% ======================================= Files 30 30 Lines 675 675 Branches 223 223 ======================================= Hits 670 670 Misses 5 5 ```

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