chore(deps): update dependency pg-boss to v9

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This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
pg-boss	^8.4.1 -> ^8.4.1 \|\| ^9.0.0
pg-boss	8.4.2 -> 9.0.0

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Release Notes

timgit/pg-boss

### [`v9.0.0`](https://togithub.com/timgit/pg-boss/releases/tag/9.0.0) [Compare Source](https://togithub.com/timgit/pg-boss/compare/8.4.2...9.0.0) #### What's Changed - MAJOR: Limit 1 active singleton queue job by [@​adamhamlin](https://togithub.com/adamhamlin) in [https://github.com/timgit/pg-boss/pull/368](https://togithub.com/timgit/pg-boss/pull/368) (requires pg 11) - MAJOR: Removed `job.done()` callback to standardize on async functions for `work()` - MINOR: All jobs returned in `work()` using the `batchSize` option are now auto-completed once the handler resolves - MAJOR: Node 16 is now the minimum required version - MAJOR: PostgreSql 11 is now the minimum required version **Full Changelog**: https://github.com/timgit/pg-boss/compare/8.4.2...9.0.0

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