Bump @types/debug from 4.1.11 to 4.1.12 #501

Job	Run time
Lint/build code	30s
Run tests (16.14.0, ubuntu-latest, bash)	58s
Run tests (16.14.0, macos-latest, bash)	1m 36s
Run tests (16.14.0, windows-latest, cmd)	1m 33s
Run tests (16.x, ubuntu-latest, bash)	37s
Run tests (16.x, macos-latest, bash)	1m 10s
Run tests (16.x, windows-latest, cmd)	1m 25s
Run tests (18.17.0, ubuntu-latest, bash)	51s
Run tests (18.17.0, macos-latest, bash)	1m 17s
Run tests (18.17.0, windows-latest, cmd)	1m 52s
Run tests (18.x, ubuntu-latest, bash)	40s
Run tests (18.x, macos-latest, bash)	1m 15s
Run tests (18.x, windows-latest, cmd)	2m 3s
Run tests (20.5.0, ubuntu-latest, bash)	39s
Run tests (20.5.0, macos-latest, bash)	57s
Run tests (20.5.0, windows-latest, cmd)	1m 14s
Run tests (20.x, ubuntu-latest, bash)	1m 11s
Run tests (20.x, macos-latest, bash)	1m 35s
Run tests (20.x, windows-latest, cmd)	1m 33s
	22m 56s

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