fix: build against current n8n-workflow for provenance publish

Replace NodeConnectionType.Main enum value (now a type-only export in
n8n-workflow 1.95+) with the 'main' literal, and pin n8n-workflow as a
build dependency so CI and local builds resolve the same version.
Compiled output is unchanged.

Author: JulianPscheid

CHANGELOG.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 - Publish to npm via a GitHub Actions workflow with an npm provenance statement (Sigstore build attestation), so the package build source can be cryptographically verified. Required for n8n Cloud verification; no functional change to the node.
+- Use the `'main'` connection-type literal for node inputs/outputs and pin the `n8n-workflow` build dependency, so the package builds reproducibly against current `n8n-workflow` releases. Compiled output is unchanged.
 - User-Agent header updated to `1.3.2`.
 
 ## [1.3.1] - 2026-06-11

nodes/Hedy/Hedy.node.ts

@@ -5,7 +5,6 @@ import {
 	INodeTypeDescription,
 	IDataObject,
 	NodeOperationError,
-	NodeConnectionType,
 } from 'n8n-workflow';
 
 import {
@@ -55,8 +54,8 @@ export class Hedy implements INodeType {
 		defaults: {
 			name: 'Hedy',
 		},
-		inputs: [{type: NodeConnectionType.Main}],
-		outputs: [{type: NodeConnectionType.Main}],
+		inputs: [{type: 'main'}],
+		outputs: [{type: 'main'}],
 		credentials: [
 			{
 				name: 'hedyApi',

nodes/Hedy/HedyTrigger.node.ts

@@ -5,7 +5,6 @@ import {
 	INodeTypeDescription,
 	IDataObject,
 	NodeOperationError,
-	NodeConnectionType,
 } from 'n8n-workflow';
 
 import {
@@ -28,7 +27,7 @@ export class HedyTrigger implements INodeType {
 			name: 'Hedy Trigger',
 		},
 		inputs: [],
-		outputs: [{type: NodeConnectionType.Main}],
+		outputs: [{type: 'main'}],
 		credentials: [
 			{
 				name: 'hedyApi',

package.json

@@ -58,6 +58,7 @@
     "eslint": "^8.56.0",
     "eslint-config-prettier": "^9.1.0",
     "eslint-plugin-n8n-nodes-base": "^1.16.1",
+    "n8n-workflow": "1.120.17",
     "prettier": "^3.2.4",
     "typescript": "^5.3.3"
   },