CI/CD

Bump execa from 5.1.1 to 8.0.1 #1719

Job	Run time
Lint files	1m 8s
Test addon (floating dependencies) (ember)	1m 33s
Test addon (floating dependencies) (node)	1m 18s
Test addon (floating dependencies) (test-apps)	1m 21s
Test addon (locked dependencies) (ember)	1m 8s
Test addon (locked dependencies) (node)	50s
Test addon (locked dependencies) (test-apps)	1m 1s
Test compatibility (ember-lts-4.4)	2m 10s
Test compatibility (ember-lts-4.8)	2m 7s
Test compatibility (ember-release)	2m 6s
Test compatibility (ember-beta)	2m 10s
Test compatibility (ember-canary)	2m 15s
Test compatibility (embroider-safe)	2m 13s
Deploy app	1s
	21m 21s

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