chore: update n8n to 2.1.5 and bump version to 2.31.6 (#521)

- Updated n8n from 2.1.4 to 2.1.5
- Updated n8n-core from 2.1.3 to 2.1.4
- Updated @n8n/n8n-nodes-langchain from 2.1.3 to 2.1.4
- Rebuilt node database with 540 nodes (434 from n8n-nodes-base, 106 from @n8n/n8n-nodes-langchain)
- Updated README badge with new n8n version
- Updated CHANGELOG with dependency changes

Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Romuald Członkowski <romualdczlonkowski@MacBook-Pro-Romuald.local>
Co-authored-by: Claude <noreply@anthropic.com>

Author: 3 people

CHANGELOG.md

@@ -7,6 +7,17 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [2.31.6] - 2026-01-03
+
+### Changed
+
+**Dependencies Update**
+
+- Updated n8n from 2.1.4 to 2.1.5
+- Updated n8n-core from 2.1.3 to 2.1.4
+- Updated @n8n/n8n-nodes-langchain from 2.1.3 to 2.1.4
+- Rebuilt node database with 540 nodes (434 from n8n-nodes-base, 106 from @n8n/n8n-nodes-langchain)
+
 ## [2.31.5] - 2026-01-02
 
 ### Added

README.md

@@ -5,7 +5,7 @@
 [![npm version](https://img.shields.io/npm/v/n8n-mcp.svg)](https://www.npmjs.com/package/n8n-mcp)
 [![codecov](https://codecov.io/gh/czlonkowski/n8n-mcp/graph/badge.svg?token=YOUR_TOKEN)](https://codecov.io/gh/czlonkowski/n8n-mcp)
 [![Tests](https://img.shields.io/badge/tests-3336%20passing-brightgreen.svg)](https://github.com/czlonkowski/n8n-mcp/actions)
-[![n8n version](https://img.shields.io/badge/n8n-2.1.4-orange.svg)](https://github.com/n8n-io/n8n)
+[![n8n version](https://img.shields.io/badge/n8n-2.1.5-orange.svg)](https://github.com/n8n-io/n8n)
 [![Docker](https://img.shields.io/badge/docker-ghcr.io%2Fczlonkowski%2Fn8n--mcp-green.svg)](https://github.com/czlonkowski/n8n-mcp/pkgs/container/n8n-mcp)
 [![Deploy on Railway](https://railway.com/button.svg)](https://railway.com/deploy/n8n-mcp?referralCode=n8n-mcp)
 

data/nodes.db

@@ -1,6 +1,6 @@
 {
   "name": "n8n-mcp",
-  "version": "2.31.5",
+  "version": "2.31.6",
   "description": "Integration between n8n workflow automation and Model Context Protocol (MCP)",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
@@ -141,15 +141,15 @@
   },
   "dependencies": {
     "@modelcontextprotocol/sdk": "1.20.1",
-    "@n8n/n8n-nodes-langchain": "^2.1.3",
+    "@n8n/n8n-nodes-langchain": "^2.1.4",
     "@supabase/supabase-js": "^2.57.4",
     "dotenv": "^16.5.0",
     "express": "^5.1.0",
     "express-rate-limit": "^7.1.5",
     "form-data": "^4.0.5",
     "lru-cache": "^11.2.1",
-    "n8n": "^2.1.4",
-    "n8n-core": "^2.1.3",
+    "n8n": "^2.1.5",
+    "n8n-core": "^2.1.4",
     "n8n-workflow": "^2.1.1",
     "openai": "^4.77.0",
     "sql.js": "^1.13.0",