build(deps-dev): bump @types/ember__test from 4.0.1 to 4.0.6 (#2550) #5583

Job	Run time
Build extensions	1m 27s
Test	2m 20s
ember-try (ember-lts-3.16)	1m 18s
ember-try (ember-lts-3.20)	1m 29s
ember-try (ember-lts-3.24)	1m 14s
ember-try (ember-lts-3.28)	1m 14s
ember-try (ember-release)	1m 17s
ember-try (ember-beta)	1m 27s
ember-try (ember-canary)	1m 27s
ember-try (ember-default-no-prototype-extensions)	1m 17s
Publish Chrome extension	9s
Publish Firefox extension	23s
Publish npm package	4s
Publish bookmarklet	0s
Publish GitHub release	0s
	15m 6s

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