[Snyk] Security upgrade pg from 7.8.0 to 8.4.0

[saurabharch]

This PR was automatically created by Snyk using the credentials of a real user.

Snyk has created this PR to fix one or more vulnerable packages in the `npm` dependencies of this project.

#### Changes included in this PR - Changes to the following files to upgrade the vulnerable dependencies to a fixed version: - package.json - package-lock.json #### Vulnerabilities that will be fixed ##### With an upgrade: Severity | Priority Score (*) | Issue | Breaking Change | Exploit Maturity :-------------------------:|-------------------------|:-------------------------|:-------------------------|:-------------------------  | **658/1000**
**Why?** Proof of Concept exploit, Recently disclosed, Has a fix available, CVSS 5.3 | Regular Expression Denial of Service (ReDoS)
[SNYK-JS-SEMVER-3247795](https://snyk.io/vuln/SNYK-JS-SEMVER-3247795) | Yes | Proof of Concept (*) Note that the real score may have changed since the PR was raised.

Commit messages

Package name: pg

The new version differs by 250 commits.

• 7ffe68e Publish
• 125a268 Update changelog
• da2bb85 Bump node-fetch from 2.6.0 to 2.6.1
• 7649890 Update SPONSORS.md
• c5445f0 Fix metadata for pg-connection-string
• a02dfac Replace semver with optional peer dependencies
• 5825843 Public export of DatabaseError
• e421167 Add ssl=true into the test
• 9cbea21 Solve issues caused by config.ssl = true
• 6be3b90 Add support for ?sslmode connection string param
• f0fc470 Update README.md (#2330)
• 95b5daa Publish
• 1f0d3d5 Add test for pgpass check function scope
• 0758b76 Fix context (this) in _checkPgPass.
• acfbafa Publish
• 07ee1ba Bump version
• 65156e7 Small readme updates & auto-formatting
• 61e4b7f Merge pull request #2309 from chris--young/ssl-err
• f4d123b Prevents bad ssl credentials from causing a crash
• 316bec3 Merge pull request #2294 from charmander/test-fixes
• 3edcbb7 Fix most SSL negotiation packet tests being ignored
• 1b022f8 Remove accidentally duplicated methods
• b8773ce Merge pull request #2289 from brianc/dependabot/npm_and_yarn/lodash-4.17.19
• 692e418 Fix documenation typo in README (#2291)

See the full diff

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