chore: update dependencies to remove all security issues

[richardms]

Originally: 11 vulnerabilities (1 low, 4 moderate, 5 high, 1 critical)
Now: found 0 vulnerabilities

[Copilot]

Pull request overview

Updates Node.js dependencies/lockfile to remediate reported vulnerabilities and bring the dev toolchain up to newer patched versions.

Changes:

• Bumps dev dependencies (chai and prettier) in package.json.
• Regenerates/updates package-lock.json (including patch version bump to 1.0.9) with updated transitive dependency graph.

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated no comments.

File	Description
package.json	Updates direct dev dependency versions (chai, prettier).
package-lock.json	Captures the resulting dependency tree updates and package version bump.

Comments suppressed due to low confidence (1)

package.json:34

• prettier@3.8.3 (and jest@28.1.3) require newer Node versions than the project currently declares in engines.node (>=6). Contributors running npm run fmt (or npm test) on older Node versions will hit engine incompatibilities/warnings or failures. Consider updating engines.node (and/or CI matrix) to reflect the minimum supported Node version, or pin tooling to versions compatible with the intended engine range.

    "prettier": "^3.8.3"
  },
  "engines": {
    "node": ">=6.0.0"
  },

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