Bump validator from "0.16.1" to "0.18.1" #2900

Job	Run time
Format	19s
Clippy	37s
Deny (advisories)	20s
Check (stable)	38s
Deny (bans licenses sources)	22s
Documentation	37s
Check (1.70.0)	42s
Hack	33s
Tests	1m 4s
Cross (aarch64-linux-android)	2m 6s
Lint markdown files	43s
Cross (aarch64-unknown-linux-gnu)	2m 11s
Tools	2m 35s
Cross (aarch64-unknown-linux-musl)	2m 10s
	14m 57s

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