build: update to latset version of neutrino

In this commit, we update to the latest version of neutrino that
includes some GC/perf optimizations when syncing, an exposed block
cache, and also additional filter verification for downloaded filters.

go.mod

@@ -45,7 +45,7 @@ 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 v0.11.1-0.20201210023533-e1978372d15e
+	github.com/lightninglabs/neutrino v0.11.1-0.20210326011815-f363e0ee1584
 	github.com/lightninglabs/protobuf-hex-display v1.3.3-0.20191212020323-b444784ce75d
 	github.com/lightningnetwork/lightning-onion v1.0.2-0.20200501022730-3c8c8d0b89ea
 	github.com/lightningnetwork/lnd/cert v1.0.3