all: update to cmp@v0.5.0 release

Change-Id: If2f6cd6b4ad63a60ad19df8602cc97cca92e5a10
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/238757
Reviewed-by: Herbie Ong <herbie@google.com>
diff --git a/go.mod b/go.mod
index df0a8f9..fcd5204 100644
--- a/go.mod
+++ b/go.mod
@@ -4,6 +4,6 @@
 
 require (
 	github.com/golang/protobuf v1.4.1
-	github.com/google/go-cmp v0.4.0
+	github.com/google/go-cmp v0.5.0
 	google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013
 )
diff --git a/go.sum b/go.sum
index 28653b2..65a77ad 100644
--- a/go.sum
+++ b/go.sum
@@ -18,8 +18,9 @@
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 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/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=