build(deps): bump github.com/libp2p/go-libp2p-kad-dht (#658)

Bumps [github.com/libp2p/go-libp2p-kad-dht](https://github.com/libp2p/go-libp2p-kad-dht) from 0.18.0 to 0.20.0.
- [Release notes](https://github.com/libp2p/go-libp2p-kad-dht/releases)
- [Commits](libp2p/go-libp2p-kad-dht@v0.18.0...v0.20.0)

---
updated-dependencies:
- dependency-name: github.com/libp2p/go-libp2p-kad-dht
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

go.mod

@@ -13,7 +13,7 @@ require (
 	github.com/gorilla/websocket v1.5.0
 	github.com/ipfs/go-log v1.0.5
 	github.com/libp2p/go-libp2p v0.22.0
-	github.com/libp2p/go-libp2p-kad-dht v0.18.0
+	github.com/libp2p/go-libp2p-kad-dht v0.20.0
 	github.com/libp2p/go-libp2p-pubsub v0.8.1
 	github.com/multiformats/go-multiaddr v0.8.0
 	github.com/prometheus/client_golang v1.14.0
@@ -90,8 +90,7 @@ require (
 	github.com/libp2p/go-cidranger v1.1.0 // indirect
 	github.com/libp2p/go-flow-metrics v0.1.0 // indirect
 	github.com/libp2p/go-libp2p-asn-util v0.2.0 // indirect
-	github.com/libp2p/go-libp2p-core v0.20.0 // indirect
-	github.com/libp2p/go-libp2p-kbucket v0.4.7 // indirect
+	github.com/libp2p/go-libp2p-kbucket v0.5.0 // indirect
 	github.com/libp2p/go-libp2p-record v0.2.0 // indirect
 	github.com/libp2p/go-msgio v0.2.0 // indirect
 	github.com/libp2p/go-nat v0.1.0 // indirect