Bump js-yaml in /vertx-web-graphql/vertx-web-graphiql #188

Job	Run time
CI-CD / IT / SockJS-WriteHandler-Tests (16.13.1)	1m 52s
CI-CD / IT / GraphQLWS-Tests (18.13.0)	1m 12s
CI-CD / CI (ubuntu-latest, 21) / Run tests	3m 32s
CI-CD / CI (windows-latest, 11) / Run tests	3m 15s
CI-CD / CI (ubuntu-latest, 11) / Run tests	3m 31s
CI-CD / Deploy	0s
	13m 22s

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