chore(deps): bump pg from 8.12.0 to 8.13.0 in /backend

[dependabot[bot]]

Bumps pg from 8.12.0 to 8.13.0.

Changelog

Sourced from pg's changelog.

All major and minor releases are briefly explained below.

For richer information consult the commit log on github with referenced pull requests.

We do not include break-fix version release in this file.

Commits

• 92cb640 Publish
• f73b22f Handle bad message ordering - make it catchable. Fixes 3174 (#3289)
• fb12280 Bump bluebird from 3.4.1 to 3.7.2 (#3303)
• 50c06f9 Remove test globals (#3264)
• f7e484e refactor: tighten up cloudflare detection (#3170)
• 3e4d545 Fix lint (#3262)
• 9baa56e feat: allow specifying a timeout on a per query base (#3074)
• 4f457e1 Remove unused file: list-db-types (#3249)
• 53dc4e6 Add test for date type (#3261)
• 83a0e3e eslint: enable rule: @​typescript-eslint/no-unused-vars (#3247)
• Additional commits viewable in compare view

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