add rename serde config to config root object

Author: replicadse

src/config.rs

@@ -1,6 +1,7 @@
 use std::collections::BTreeMap;
 
 #[derive(Debug, serde::Serialize, serde::Deserialize)]
+#[serde(rename_all = "snake_case")]
 pub struct Config {
     pub version: String,
     #[serde(default)]