chore(deps): update dependency sharp to ^0.34.0 #758

Job	Run time
Tests	1m 33s
Additional Tests (ember-release)	1m 14s
Additional Tests (ember-canary)	1m 20s
Additional Tests (ember-classic)	1m 34s
Additional Tests (ember-lts-3.24)	1m 19s
Additional Tests (ember-beta)	1m 20s
Additional Tests (ember-lts-with-jquery)	1m 19s
Additional Tests (embroider-optimized)	1m 26s
Additional Tests (embroider-safe)	1m 24s
	12m 29s

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