Expose `Dependencies` field in Library struct #5394

Job	Run time
run-determination	1s
check-outdated (./)	16s
check-formatting (./)	20s
check-style (./)	56s
build (internal/arduino/discovery/discovery_client)	20s
build (rpc/internal/client_example)	36s
check-config (./)	15s
build (commands/term_example)	31s
check-license-headers (./)	20s
	3m 35s

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