Bump debug and docpad

Bumps [debug](https://github.com/debug-js/debug) to 4.3.4 and updates ancestor dependency [docpad](https://github.com/docpad/docpad). These dependencies need to be updated together.


Updates `debug` from 2.2.0 to 4.3.4
- [Release notes](https://github.com/debug-js/debug/releases)
- [Commits](debug-js/debug@2.2.0...4.3.4)

Updates `docpad` from 6.79.4 to 6.83.2
- [Changelog](https://github.com/docpad/docpad/blob/master/HISTORY.md)
- [Commits](docpad/docpad@v6.79.4...v6.83.2)

---
updated-dependencies:
- dependency-name: debug
  dependency-type: indirect
- dependency-name: docpad
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]