Lock file maintenance (#183) #422

Job	Run time
Floating Dependencies	1m 29s
Tests	1m 16s
ember-lts-4.12	1m 30s
ember-release	1m 30s
ember-beta	1m 25s
ember-canary	1m 30s
no-deprecations	1m 25s
ember-release-no-deprecations	1m 30s
embroider-safe	1m 46s
embroider-optimized	1m 43s
ember-modifier-3.2.7	1m 33s
	16m 37s

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