Update constants to reflect 18.0.0-snapshot
import sys
# Kubernetes branch to get the OpenAPI spec from.
-KUBERNETES_BRANCH = "release-1.17"
+KUBERNETES_BRANCH = "release-1.18"
# client version for packaging and releasing.
-CLIENT_VERSION = "17.0.0-snapshot"
+CLIENT_VERSION = "18.0.0-snapshot"
# Name of the release package
PACKAGE_NAME = "kubernetes"
