build(deps-dev): add debug

[Fdawgs]

Used in tests but not explicitly defined as dependency:

pino/benchmarks/basic.bench.js

Lines 18 to 20 in 548f257

	const debug = require('debug')
	const dlog = debug('dlog')
	dlog.log = function (s) { dest.write(s) }

Checklist

• commit message and code follows the Developer's Certification of Origin
  and the Code of conduct

[github-actions]

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