Try testing newer safaris and see what happens #7819

Job	Run time
Linting	1m 51s
Type Checking (current version)	1m 14s
Debug and Prebuilt (All Tests by Package + Canary Features)	4m 47s
Type Checking (other supported versions) (4.9)	2m 2s
Type Checking (other supported versions) (5.0)	1m 46s
Type Checking (other supported versions) (next)	1m 29s
Blueprint Tests	4m 19s
Node.js Tests	1m 18s
Browser Tests (Firefox)	2m 52s
Browserstack Tests (Safari, Edge)	3m 43s
Extend Prototypes	3m 17s
Production (All Tests + Canary Features with Debug Render Tree)	5m 31s
Production (All Tests + Canary Features)	4m 29s
Smoke tests (Full Ember Apps)	2m 17s
Publish channel to s3	0s
Publish alpha from default branch	0s
Deploy tags to npm	0s
Notify Discord	0s
	40m 55s

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