Use json5 for renovate.json

Author: alanorth

renovate.json

@@ -0,0 +1,9 @@
+{
+  $schema: "https://docs.renovatebot.com/renovate-schema.json",
+  lockFileMaintenance: {
+    enabled: true,
+  },
+  pip_requirements: {
+    enabled: false
+  }
+}