mod: bump neutrino dep to latest version

We update the Neutrino dependency to the latest version that fixed a
struct alignment and several loop variable as pointer issues found by
the linter.

go.mod

@@ -43,7 +43,7 @@ require (
 	github.com/juju/utils v0.0.0-20180820210520-bf9cc5bdd62d // indirect
 	github.com/juju/version v0.0.0-20180108022336-b64dbd566305 // indirect
 	github.com/kkdai/bstream v0.0.0-20181106074824-b3251f7901ec
-	github.com/lightninglabs/neutrino v0.11.1-0.20210429202752-e6974af1494e
+	github.com/lightninglabs/neutrino v0.11.1-0.20210506195545-dec9dbeb3a25
 	github.com/lightninglabs/protobuf-hex-display v1.4.3-hex-display
 	github.com/lightningnetwork/lightning-onion v1.0.2-0.20200501022730-3c8c8d0b89ea
 	github.com/lightningnetwork/lnd/cert v1.0.3