Update dependencies and simplify lint config

[MarcusLongmuir]

This PR:

• Updates dependencies
• Migrated eslint configuration to latest "flat" config and swapped out some plugins that were no longer compatible
• Applied lint rules to files that were outside of src/test directories to be consistent

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What kind of changes does your PR introduce? (check at least one)

• [x] Other, please describe: Updated dependencies and lint config

Does your PR introduce a breaking change? (check one)

• [x] No

If yes, please describe its impact and migration path for existing applications:

Does your PR fulfill the following requirements?

• [ ] All tests are passing