Merge pull request kubernetes#2926 from losipiuk/lo/ca-1.18.0

Bump Cluster Autoscaler version to 1.18.0

Author: k8s-ci-robot

cluster-autoscaler/version/version.go

@@ -17,4 +17,4 @@ limitations under the License.
 package version
 
 // ClusterAutoscalerVersion contains version of CA.
-const ClusterAutoscalerVersion = "1.18.0-beta.1"
+const ClusterAutoscalerVersion = "1.18.0"