deps: bump @types/sinon from 20.0.0 to 21.0.0 #4986

Job	Run time
Build	3m 7s
Test example js-libp2p-example-chat	1m 20s
Test example js-libp2p-example-discovery-mechanisms	1m 12s
Test example js-libp2p-example-delegated-routing	1m 53s
Test example js-libp2p-example-circuit-relay	1m 9s
Test example js-libp2p-example-connection-encryption	1m 22s
Test example js-libp2p-example-pnet	1m 10s
Test example js-libp2p-example-custom-protocols	1m 10s
Test example js-libp2p-example-browser-pubsub	2m 10s
Test example js-libp2p-example-webrtc-private-to-private	1m 43s
Test example js-libp2p-example-pubsub	1m 15s
Test example js-libp2p-example-protocol-and-stream-muxing	1m 18s
Test example js-libp2p-example-peer-and-content-routing	1m 10s
Test example js-libp2p-example-transports	1m 15s
Test example js-libp2p-example-webrtc-private-to-public	2m 10s
	23m 24s

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