[release-0.17] Auto-update dependencies (#256)

Produced via:
  `./hack/update-deps.sh --upgrade && ./hack/update-codegen.sh`
/assign tcnghia
/cc tcnghia

Author: mattmoor

go.mod

@@ -5,18 +5,18 @@ go 1.14
 require (
 	github.com/gobuffalo/envy v1.9.0 // indirect
 	github.com/gogo/protobuf v1.3.1
-	github.com/google/go-cmp v0.5.1
+	github.com/google/go-cmp v0.5.2
 	go.uber.org/zap v1.15.0
 	golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208
 	istio.io/api v0.0.0-20200615162408-9b5293c30ef5
 	istio.io/client-go v0.0.0-20200615164228-d77b0b53b6a0
 	istio.io/gogo-genproto v0.0.0-20191029161641-f7d19ec0141d // indirect
 	k8s.io/api v0.18.7-rc.0
-	k8s.io/apimachinery v0.18.7-rc.0
+	k8s.io/apimachinery v0.19.0
 	k8s.io/client-go v11.0.1-0.20190805182717-6502b5e7b1b5+incompatible
 	knative.dev/networking v0.0.0-20200817055406-2b6d120d60b8
-	knative.dev/pkg v0.0.0-20200812224206-44c860147a87
-	knative.dev/test-infra v0.0.0-20200813220834-388e55a496cf
+	knative.dev/pkg v0.0.0-20200824160247-5343c1d19369
+	knative.dev/test-infra v0.0.0-20200828171708-f68cb78c80a9
 )
 
 replace (