Merge pull request #515 from ember-learn/release-preview #400

Job	Run time
Tests	2m 39s
Floating Dependencies	1m 49s
Percy Tests	2m 28s
ember-lts-3.28	2m 56s
ember-canary - Allowed to fail	3m 7s
ember-release	2m 58s
ember-release-no-deprecations - Allowed to fail	3m 1s
ember-beta	2m 58s
ember-classic	3m 5s
ember-default-with-jquery	3m 0s
embroider-safe	2m 58s
embroider-optimized	2m 53s
no-deprecations	2m 59s
	36m 51s

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