fix(deps): update dependency pg to v8.11.3

This MR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
pg	8.10.0 -> 8.11.3

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Release Notes

brianc/node-postgres

v8.11.3

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v8.11.2

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v8.11.1

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v8.11.0

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