Update dependencies

Author: olivierlemasle

go.mod

@@ -4,18 +4,19 @@ go 1.15
 
 require (
 	github.com/apache/cloudstack-go/v2 v2.9.1-0.20210727090705-0ad6453e08b8
-	github.com/container-storage-interface/spec v1.3.0
-	github.com/grpc-ecosystem/go-grpc-middleware v1.2.2
+	github.com/container-storage-interface/spec v1.5.0
+	github.com/grpc-ecosystem/go-grpc-middleware v1.3.0
 	github.com/hashicorp/go-uuid v1.0.2
-	github.com/kubernetes-csi/csi-test/v4 v4.1.0
+	github.com/kubernetes-csi/csi-test/v4 v4.2.0
 	go.uber.org/zap v1.16.0
-	golang.org/x/text v0.3.5
-	google.golang.org/grpc v1.36.0
+	golang.org/x/text v0.3.6
+	google.golang.org/genproto v0.0.0-20210726200206-e7812ac95cc0 // indirect
+	google.golang.org/grpc v1.39.0
 	gopkg.in/gcfg.v1 v1.2.3
 	gopkg.in/warnings.v0 v0.1.2 // indirect
-	k8s.io/api v0.20.4
-	k8s.io/apimachinery v0.20.4
-	k8s.io/client-go v0.20.4
-	k8s.io/mount-utils v0.20.4
+	k8s.io/api v0.21.3
+	k8s.io/apimachinery v0.21.3
+	k8s.io/client-go v0.21.3
+	k8s.io/mount-utils v0.21.3
 	k8s.io/utils v0.0.0-20210111153108-fddb29f9d009
 )