Add renovate.json.

Change-Id: I07ce539d7e42dfba815e354c24370b7ff105aeb0
diff --git a/renovate.json b/renovate.json
new file mode 100644
index 0000000..c199ead
--- /dev/null
+++ b/renovate.json
@@ -0,0 +1,14 @@
+{ "$schema": "https://docs.renovatebot.com/renovate-schema.json"
+, "extends":
+  [ "config:base"
+  , ":assignAndReview(benkard)"
+  , ":autodetectPinVersions"
+  , ":disableDependencyDashboard"
+  , ":docker"
+  , ":rebaseStalePrs"
+  , ":semanticCommits" 
+  , ":semanticPrefixChore"
+  ]
+, "configMigration": true
+}
+