Configure Renovate (#98)

Author: renovate[bot]

renovate.json

@@ -0,0 +1,10 @@
+{
+  "extends": [
+    "config:base"
+  ],
+  "rangeStrategy": "replace",
+  "lockFileMaintenance": {
+    "enabled": true,
+    "extends": "schedule:weekly"
+  }
+}