fix: unhandled promise rejection when finding gateway #3854

Job	Run time
Build	3m 14s
Test example js-libp2p-example-browser-pubsub	2m 20s
Test example js-libp2p-example-chat	1m 16s
Test example js-libp2p-example-circuit-relay	1m 43s
Test example js-libp2p-example-connection-encryption	54s
Test example js-libp2p-example-custom-protocols	51s
Test example js-libp2p-example-delegated-routing	1m 42s
Test example js-libp2p-example-discovery-mechanisms	1m 21s
Test example js-libp2p-example-peer-and-content-routing	52s
Test example js-libp2p-example-pnet	53s
Test example js-libp2p-example-protocol-and-stream-muxing	1m 15s
Test example js-libp2p-example-pubsub	59s
Test example js-libp2p-example-transports	49s
Test example js-libp2p-example-webrtc-private-to-private	1m 38s
	19m 47s

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