chore(deps): update dependency pg-pubsub to v0.6.0 - autoclosed

[mend-for-github-com[bot]]

This PR contains the following updates:

Package	Type	Update	Change
pg-pubsub	dependencies	minor	0.5.0 -> 0.6.0

By merging this PR, the issue #17 will be automatically resolved and closed:

Severity	CVSS Score	CVE
High	7.5	CVE-2022-25883

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Release Notes

voxpelli/node-pg-pubsub (pg-pubsub)

### [`v0.6.0`](https://togithub.com/voxpelli/node-pg-pubsub/releases/tag/v0.6.0) [Compare Source](https://togithub.com/voxpelli/node-pg-pubsub/compare/v0.5.0...v0.6.0) - **Breaking change:** Now requires Node.js >=12.x - **Breaking change:** `.addChannel()` now returns a `Promise` rather than the `PGPubsub` instance - **Dependencies:** Updated to `promised-retry` version `0.4.x` - **Improvement:** Generates TypeScript type definition files

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