hack/release: add automate bump-up script

hack/release/bump_version.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+
+# Usage:
+#   ./hack/release/bump_version.sh 0.8.0 0.8.1
+
+oldv=$1
+newv=$2
+
+echo "old version: ${oldv}, new version: ${newv}"
+
+sed -i.bak -e "s/${oldv}+git/${newv}/g" version/version.go
+sed -i.bak -e "s/${oldv}/${newv}/g" example/deployment.yaml
+sed -i.bak -e "s/${oldv}/${newv}/g" example/etcd-backup-operator/deployment.yaml
+sed -i.bak -e "s/${oldv}/${newv}/g" example/etcd-restore-operator/deployment.yaml
+
+rm version/version.go.bak
+rm example/deployment.yaml.bak
+rm example/etcd-backup-operator/deployment.yaml.bak
+rm example/etcd-restore-operator/deployment.yaml.bak