chore: bump versions to v0.18 #190

Job	Run time
basic-operations/anchor/burn	11m 5s
basic-operations/anchor/create	7m 38s
basic-operations/anchor/create-nullifier	7m 38s
basic-operations/anchor/update	11m 4s
basic-operations/anchor/reinit	8m 22s
counter/anchor	7m 49s
create-and-update	8m 39s
basic-operations/anchor/close	7m 55s
zk/zk-id	6m 50s
zk/nullifier	5m 42s
	1h 22m 42s

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