v1.4.0 image and readme

Change-Id: I20472536583a5a7d539922806f884b5005225b53

Author: mattcary

README.md

@@ -12,7 +12,7 @@ lifecycle of Google Compute Engine Persistent Disks.
 ## Project Status
 
 Status: GA
-Latest stable image: `k8s.gcr.io/cloud-provider-gcp/gcp-compute-persistent-disk-csi-driver:v1.3.4`
+Latest stable image: `k8s.gcr.io/cloud-provider-gcp/gcp-compute-persistent-disk-csi-driver:v1.4.0`
 
 ### Test Status
 

deploy/kubernetes/images/prow-gke-release-staging-rc-master/image.yaml

@@ -48,6 +48,6 @@ metadata:
 imageTag:
   name: k8s.gcr.io/cloud-provider-gcp/gcp-compute-persistent-disk-csi-driver
   newName: gcr.io/k8s-staging-cloud-provider-gcp/gcp-compute-persistent-disk-csi-driver
-  newTag: "v1.4.0-rc2"
+  newTag: "v1.4.0"
 ---
 

deploy/kubernetes/images/stable-master/image.yaml

@@ -52,5 +52,5 @@ imageTag:
   # Don't change stable image without changing pdImagePlaceholder in
   # test/k8s-integration/main.go
   newName: k8s.gcr.io/cloud-provider-gcp/gcp-compute-persistent-disk-csi-driver
-  newTag: "v1.3.4"
+  newTag: "v1.4.0"
 ---