build: add renovate.json (#273)

renovate[bot] · bcoe · commit bf41474cd9b6 · 2019-05-04T21:50:21.000-07:00
diff --git a/renovate.json b/renovate.json
@@ -1,3 +1,5 @@
 {
-  "enabled": false
+  "extends": [
+    "config:base"
+  ]
 }
