chore: bump version to 2.1.18 in package.json and package-lock.json

Author: kastov

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@remnawave/backend",
-  "version": "2.1.17",
+  "version": "2.1.18",
   "description": "Remnawave Panel Backend",
   "private": false,
   "type": "commonjs",
@@ -164,4 +164,4 @@
     "typescript": "~5.9.2",
     "typescript-eslint": "^8.39.1"
   }
-}
+}