chore(deps-dev): bump @ember/test-helpers from 3.3.0 to 4.0.4 #1394

Job	Run time
Floating Dependencies	1m 49s
Tests	1m 0s
Type checking - [email protected]	53s
Type checking - [email protected]	52s
ember-try: ember-lts-3.28	1m 23s
Type checking - [email protected]	57s
Type checking - typescript@next	58s
ember-try: ember-lts-4.4	56s
ember-try: ember-lts-4.8	1m 17s
ember-try: ember-lts-4.12	1m 10s
ember-try: ember-release	1m 24s
ember-try: ember-beta	1m 33s
ember-try: ember-canary	57s
ember-try: ember-classic	1m 33s
ember-try: embroider-safe	58s
ember-try: embroider-optimized	2m 2s
	19m 42s

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