Add ability to use custom components for icons (#559) #311

Job	Run time
Tests	3m 17s
Docs	1m 51s
Floating Dependencies	3m 35s
Node Tests	1m 23s
Coverage Report (default)	2m 35s
Coverage Report (plain-html)	3m 30s
ember-lts-4.4, Chrome	3m 59s
Coverage Report (bs4)	4m 24s
ember-lts-4.8, Chrome	5m 8s
Coverage Report (bs5)	5m 0s
ember-release, Chrome	4m 59s
ember-beta, Chrome	5m 14s
ember-canary, Chrome	4m 12s
ember-lts-4.4-with-plain-html, Chrome	3m 44s
ember-lts-4.8-with-plain-html, Chrome	3m 57s
ember-beta-with-plain-html, Chrome	3m 42s
ember-lts-4.4-with-ember-bootstrap-v4, Chrome	4m 27s
ember-lts-4.8-with-ember-bootstrap-v4, Chrome	3m 58s
ember-beta-with-ember-bootstrap-v4, Chrome	3m 58s
ember-lts-4.4-with-ember-bootstrap-v5, Chrome	3m 47s
ember-lts-4.8-with-ember-bootstrap-v5, Chrome	4m 14s
ember-beta-with-ember-bootstrap-v5, Chrome	4m 7s
embroider-safe, Chrome	3m 54s
embroider-optimized, Chrome	3m 40s
ember-release, Firefox	4m 8s
ember-default-with-ember-bootstrap-v4, Firefox	6m 27s
ember-default-with-ember-bootstrap-v5, Firefox	4m 16s
ember-default-with-plain-html, Firefox	3m 11s
Send Coverage Report	57s
	1h 51m 34s

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