Merge pull request #265 from ember-cli/release-preview #784

Job	Run time
Linting	21s
Tests	52s
Tests: macos	38s
ember-3.27	53s
Tests: windows	2m 37s
Tests: Node	25s
Floating Deps	36s
ember-4.12	56s
ember-release	58s
ember-beta	38s
ember-canary	1m 0s
embroider-safe-min-supported	57s
embroider-optimized-min-supported	1m 7s
embroider-safe-release	47s
embroider-optimized-release	43s
	13m 28s

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