chore(deps-dev): bump ember-cli from 4.12.3 to 5.12.0 #987

Job	Run time
Lint	37s
Tests (ubuntu-latest, chrome)	40s
Floating Dependencies (ubuntu-latest, chrome)	54s
Tests - ember-lts-3.28	33s
Type checking - [email protected]	53s
Tests - ember-lts-4.4	22s
Type checking - [email protected]	44s
Tests - ember-lts-4.8	12s
Type checking - [email protected]	46s
Tests - ember-lts-4.12	25s
Type checking - typescript@next	50s
Tests - ember-classic	36s
Tests - ember-release	3s
Tests - ember-beta	48s
Tests - embroider-safe	1s
Tests - embroider-optimized	1s
Tests - ember-canary	51s
	9m 16s

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