Fix compatibility with ember-cli 5.4+ #636

Job	Run time
Lint JS	19s
Tests: Type Check	14s
Tests (addon-location)	53s
[email protected] : defaults with npm	1m 44s
Tests (test-app-location)	21s
[email protected] : defaults with yarn	1m 32s
Tests (addon-only)	29s
[email protected] : defaults with pnpm	1m 6s
Tests (monorepo with npm)	29s
[email protected] : typescript with npm	2m 11s
Tests (monorepo with yarn)	26s
[email protected] : typescript with yarn	1m 48s
[email protected] : typescript with pnpm	1m 21s
Tests (monorepo with pnpm)	31s
[email protected] : defaults with npm	1m 48s
Tests (rollup-build)	1m 21s
[email protected] : defaults with yarn	1m 27s
[email protected] : defaults with pnpm	1m 25s
[email protected] : typescript with npm	2m 14s
[email protected] : typescript with yarn	1m 54s
[email protected] : typescript with pnpm	1m 32s
	25m 5s

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