Bump github.com/google/go-cmp from 0.4.0 to 0.5.0 (#29)

Bumps [github.com/google/go-cmp](https://github.com/google/go-cmp) from 0.4.0 to 0.5.0.
- [Release notes](https://github.com/google/go-cmp/releases)
- [Commits](https://github.com/google/go-cmp/compare/v0.4.0...v0.5.0)

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

go.mod

@@ -4,7 +4,7 @@ require (
 	github.com/dgryski/go-metro v0.0.0-20180109044635-280f6062b5bc // indirect
 	github.com/golang/mock v1.4.3
 	github.com/golang/protobuf v1.4.2
-	github.com/google/go-cmp v0.4.0
+	github.com/google/go-cmp v0.5.0
 	github.com/gorilla/websocket v1.4.2
 	github.com/miekg/dns v1.1.4
 	github.com/refraction-networking/utls v0.0.0-20190909200633-43c36d3c1f57

go.sum

@@ -30,6 +30,8 @@ github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
 github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.4.0 h1:xsAVV57WRhGj6kEIi8ReJzQlHHqcBYCElAvkovg3B/4=
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.0 h1:/QaMHBdZ26BB3SSst0Iwl10Epc+xhTquomWX0oZEB6w=
+github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/gorilla/websocket v1.4.1 h1:q7AeDBpnBk8AogcD4DSag/Ukw/KV+YhzLj2bP5HvKCM=
 github.com/gorilla/websocket v1.4.1/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc=