update to v5.4 with ember-cli-update #44

Job	Run time
Floating Dependencies	45s
Tests	58s
ember-lts-3.16	35s
ember-lts-3.20	29s
ember-lts-3.24	32s
ember-lts-3.28	37s
ember-lts-4.4	31s
ember-lts-4.8	36s
ember-lts-4.12	35s
ember-release	31s
ember-beta	32s
ember-canary	39s
ember-classic	32s
embroider-safe	39s
embroider-optimized	40s
no-deprecations	31s
ember-release-no-deprecations	31s
	10m 13s

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