Merge pull request #136 from empress/drop-ember-3-12 #116

Job	Run time
Floating Dependencies	27s
Tests	29s
ember-lts-3.16	40s
ember-lts-3.20	46s
ember-lts-3.24	35s
ember-lts-3.28	36s
ember-lts-4.4	31s
ember-lts-4.8	32s
ember-release	32s
ember-beta	33s
ember-canary	32s
ember-classic	38s
embroider-safe	37s
embroider-optimized	41s
no-deprecations	43s
ember-release-no-deprecations	38s
	9m 30s

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