chore(deps-dev): bump ember-source from 5.3.0 to 5.4.0 #747

Job	Run time
Floating Dependencies	56s
Tests	1m 0s
Type checking - [email protected]	54s
ember-lts-3.28	54s
Type checking - [email protected]	48s
ember-lts-4.4	56s
Type checking - typescript@next	54s
ember-lts-4.8	54s
ember-lts-4.12	51s
ember-release	1m 6s
ember-beta	55s
ember-canary	1m 13s
ember-classic	1m 8s
embroider-safe	42s
embroider-optimized	42s
	13m 53s

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