refactor: move fetchCurrentConfigVersion() to settings loader

lib/new-settings-loader.js

@@ -228,6 +228,15 @@ function load (versionId) {
     }))
 }
 
+const fetchCurrentConfigVersion = () => {
+  const sql = `SELECT id FROM user_config
+    WHERE type = 'config'
+      AND valid
+    ORDER BY id DESC
+    LIMIT 1`
+  return db.one(sql).then(row => row.id)
+}
+
 module.exports = {
   saveConfig,
   migrationSaveConfig,
@@ -238,5 +247,6 @@ module.exports = {
   loadLatestConfig,
   loadLatestConfigOrNone,
   load,
-  removeFromConfig
+  removeFromConfig,
+  fetchCurrentConfigVersion,
 }