expand test-helpers peer range #906

Job	Run time
Tests	1m 3s
Floating Dependencies	1m 4s
Type checking - typescript-4.2	1m 34s
ember-lts-4.4	1m 54s
Type checking - typescript-4.3	1m 36s
ember-lts-4.8	1m 55s
Type checking - typescript-4.4	1m 42s
ember-release	1m 50s
Type checking - typescript-4.5	1m 34s
Type checking - typescript-next	1m 34s
ember-beta	1m 49s
ember-canary	1m 53s
embroider-safe	1m 54s
embroider-optimized	1m 57s
	23m 19s

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