Update vendor

vendor/k8s.io/component-base/metrics/version_parser.go

@@ -0,0 +1,50 @@
+/*
+Copyright 2019 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package metrics
+
+import (
+	"fmt"
+	"regexp"
+
+	"github.com/blang/semver"
+
+	apimachineryversion "k8s.io/apimachinery/pkg/version"
+)
+
+const (
+	versionRegexpString = `^v(\d+\.\d+\.\d+)`
+)
+
+var (
+	versionRe = regexp.MustCompile(versionRegexpString)
+)
+
+func parseSemver(s string) *semver.Version {
+	if s != "" {
+		sv := semver.MustParse(s)
+		return &sv
+	}
+	return nil
+}
+func parseVersion(ver apimachineryversion.Info) semver.Version {
+	matches := versionRe.FindAllStringSubmatch(ver.String(), -1)
+
+	if len(matches) != 1 {
+		panic(fmt.Sprintf("version string \"%v\" doesn't match expected regular expression: \"%v\"", ver.String(), versionRe.String()))
+	}
+	return semver.MustParse(matches[0][1])
+}