chore(deps-dev): bump @ember/test-helpers from 3.3.0 to 4.0.4 #1424

Job	Run time
Tests	58s
Floating Dependencies	55s
Type checking - [email protected]	49s
Type checking - [email protected]	52s
ember-try: ember-lts-3.28	1m 11s
Type checking - [email protected]	47s
ember-try: ember-lts-4.4	1m 9s
Type checking - typescript@next	52s
ember-try: ember-lts-4.8	1m 11s
ember-try: ember-lts-4.12	58s
ember-try: ember-release	1m 6s
ember-try: ember-beta	1m 11s
ember-try: ember-canary	1m 26s
ember-try: ember-classic	1m 13s
ember-try: embroider-safe	1m 22s
ember-try: embroider-optimized	1m 2s
	17m 2s

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