Update devDependencies (major) - autoclosed #1179

Job	Run time
Test ember-scoped-css	57s
Lints	58s
Test test-apps/classic-app	1m 42s
Test test-apps/embroider-app	1m 20s
Test test-apps/pods-embroider-app	1m 23s
Test test-apps/pods-classic-app	1m 11s
Floating ember-scoped-css	57s
ember-lts-4.4	2m 15s
Floating test-apps/classic-app	1m 38s
ember-lts-4.12	1m 56s
Floating test-apps/embroider-app	1m 17s
ember-lts-5.4	1m 54s
Floating test-apps/pods-embroider-app	1m 14s
ember-lts-5.8	2m 9s
Floating test-apps/pods-classic-app	1m 25s
ember-release	2m 9s
ember-beta	1m 59s
	26m 24s

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