chore: update n8n to 2.12.3 and bump version to 2.37.4

- Updated n8n from 2.11.4 to 2.12.3
- Updated n8n-core from 2.11.1 to 2.12.0
- Updated n8n-workflow from 2.11.1 to 2.12.0
- Updated @n8n/n8n-nodes-langchain from 2.11.2 to 2.12.0
- Rebuilt node database with 1,239 nodes (809 core + 430 community)
- 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: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -7,6 +7,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [2.37.4] - 2026-03-18
+
+### Changed
+
+- **Updated n8n dependencies**: n8n 2.11.4 → 2.12.3, n8n-core 2.11.1 → 2.12.0, n8n-workflow 2.11.1 → 2.12.0, @n8n/n8n-nodes-langchain 2.11.2 → 2.12.0
+- **Rebuilt node database**: 1,239 nodes (809 from n8n-nodes-base and @n8n/n8n-nodes-langchain, 430 community)
+
+Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en
+
 ## [2.37.3] - 2026-03-15
 
 ### Fixed

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-2.11.4-orange.svg)](https://github.com/n8n-io/n8n)
+[![n8n version](https://img.shields.io/badge/n8n-2.12.3-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)
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "n8n-mcp",
-  "version": "2.37.3",
+  "version": "2.37.4",
   "description": "Integration between n8n workflow automation and Model Context Protocol (MCP)",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
@@ -153,16 +153,16 @@
   },
   "dependencies": {
     "@modelcontextprotocol/sdk": "^1.27.1",
-    "@n8n/n8n-nodes-langchain": "^2.11.2",
+    "@n8n/n8n-nodes-langchain": "^2.12.0",
     "@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": "^2.11.4",
-    "n8n-core": "^2.11.1",
-    "n8n-workflow": "^2.11.1",
+    "n8n": "^2.12.3",
+    "n8n-core": "^2.12.0",
+    "n8n-workflow": "^2.12.0",
     "openai": "^4.77.0",
     "sql.js": "^1.13.0",
     "tslib": "^2.6.2",