feat: migrate to flat config

Related to bpmn-io/internal-docs#1042

.github/workflows/CI.yml

@@ -6,8 +6,8 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [ 14, 16 ]
-        eslint: [ 7, '' ]
+        node-version: [ 18, 20, 22 ]
+        eslint: [ 9, '' ]
 
     steps:
     - name: Checkout

configs/apache.js

@@ -1,10 +1,14 @@
-const path = require('path');
+import licenseHeaderPlugin from 'eslint-plugin-license-header';
 
-module.exports = {
-  plugins: [
-    'license-header'
-  ],
-  rules: {
-    'license-header/header': [2, path.join(__dirname, '/../resources/apache-license-header.js') ]
+import apacheLicenseHeader from '../resources/apache-license-header.js'
+
+export default [
+  {
+    plugins: {
+      'license-header': licenseHeaderPlugin
+    },
+    rules: {
+      'license-header/header': [2, apacheLicenseHeader.split('\n')]
+    }
   }
-};
+]

configs/commercial.js

@@ -1,10 +1,14 @@
-const path = require('path');
+import licenseHeaderPlugin from 'eslint-plugin-license-header';
 
-module.exports = {
-  plugins: [
-    'license-header'
-  ],
-  rules: {
-    'license-header/header': [2, path.join(__dirname, '/../resources/commercial-license-header.js') ]
+import commercialLicenseHeader from '../resources/commercial-license-header.js'
+
+export default [
+  {
+    plugins: {
+      'license-header': licenseHeaderPlugin
+    },
+    rules: {
+      'license-header/header': [2, commercialLicenseHeader.split('\n')]
+    }
   }
-};
+]

configs/mit.js

@@ -1,10 +1,14 @@
-const path = require('path');
+import licenseHeaderPlugin from 'eslint-plugin-license-header';
 
-module.exports = {
-  plugins: [
-    'license-header'
-  ],
-  rules: {
-    'license-header/header': [2, path.join(__dirname, '/../resources/MIT-license-header.js') ]
+import mitLicenseHeader from '../resources/MIT-license-header.js';
+
+export default [
+  {
+    plugins: {
+      'license-header': licenseHeaderPlugin
+    },
+    rules: {
+      'license-header/header': [2, mitLicenseHeader.split('\n')]
+    }
   }
-};
+]

index.js

@@ -1,10 +1,8 @@
-'use strict';
+import mit from './configs/mit';
+import commercial from './configs/commercial';
+import apache from './configs/apache';
 
-var mit = require('./configs/mit');
-var commercial = require('./configs/commercial');
-var apache = require('./configs/apache');
-
-module.exports = {
+export default {
   configs: {
     mit,
     MIT: mit,