fix vulns + upgrade eslint to latest (#1183)

* fix vulns + upgrade eslint to latest

* latest node

* address a bots comment

Author: juanri0s

.eslintignore

@@ -3,7 +3,7 @@ name: Bug report
 about: Create a report to help us improve
 title: '[BUG]'
 labels: bug
-assignees: doug-martin, dustinsmith1024
+assignees: dustinsmith1024
 ---
 
 **Describe the bug**

.eslintrc.js

@@ -1 +1 @@
-20.19.6
+20.20.0

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1 @@
+nodejs 20.20.0

.nvmrc

@@ -3,11 +3,7 @@
 All notable changes to this project will be documented in this file.
 See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
 
-## [5.0.6](https://github.com/C2FO/fast-csv/compare/v5.0.5...v5.0.6) (2025-12-22)
-
-### Security
-
-- **deps:** update @docusaurus/core and @docusaurus/preset-classic to v3.9.2 to resolve security vulnerabilities
+## [Unreleased]
 
 ## [5.0.5](https://github.com/C2FO/fast-csv/compare/v5.0.2...v5.0.5) (2025-08-04)
 

.tool-versions

@@ -1,6 +1,6 @@
 The MIT License
 
-Copyright (c) 2011-2025 C2FO
+Copyright (c) 2011-2026 C2FO
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

CHANGELOG.md

@@ -0,0 +1,105 @@
+// @ts-check
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+import eslint from '@eslint/js';
+import { defineConfig } from 'eslint/config';
+import tseslint from 'typescript-eslint';
+import globals from 'globals';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+import prettier from 'eslint-plugin-prettier';
+import importPlugin from 'eslint-plugin-import';
+import jest from 'eslint-plugin-jest';
+import tsdoc from 'eslint-plugin-tsdoc';
+import eslintConfigPrettier from 'eslint-config-prettier';
+
+export default defineConfig([
+  // Ignore patterns (flat config: no other properties in this object)
+  {
+    ignores: [
+      '**/build',
+      '**/node_modules',
+      'documentation',
+      '**/.eslintrc.js',
+      '**/.eslintrc.cjs',
+      '**/eslint.config.*',
+    ],
+  },
+
+  // Base ESLint recommended
+  eslint.configs.recommended,
+
+  // TypeScript ESLint: recommended only for .ts (so .js files don't get TS rules)
+  ...tseslint.configs.recommended.map((config) => ({
+    ...config,
+    files: ['**/*.ts'],
+  })),
+
+  // Prettier: disable rules that conflict (must be last of shared configs)
+  eslintConfigPrettier,
+
+  // TypeScript files: type-checked config + language options + plugins + rules
+  ...tseslint.configs.recommendedTypeChecked.map((config) => ({
+    ...config,
+    files: ['**/*.ts'],
+  })),
+  {
+    files: ['**/*.ts'],
+    languageOptions: {
+      parserOptions: {
+        projectService: true,
+        tsconfigRootDir: __dirname,
+      },
+      globals: {
+        ...globals.node,
+        ...globals.jest,
+      },
+    },
+    plugins: {
+      prettier,
+      import: importPlugin,
+      jest,
+      tsdoc,
+    },
+    rules: {
+      '@typescript-eslint/no-unsafe-argument': 'off',
+      '@typescript-eslint/no-unsafe-return': 'warn',
+      '@typescript-eslint/no-unsafe-assignment': 'warn',
+      'prettier/prettier': 'error',
+      'arrow-body-style': ['warn', 'always'],
+      'tsdoc/syntax': 'warn',
+      'import/prefer-default-export': 'off',
+      'import/no-default-export': 'error',
+      'no-underscore-dangle': 'off',
+    },
+  },
+
+  // Spec files: relax some rules
+  {
+    files: ['**/*.spec.ts'],
+    rules: {
+      '@typescript-eslint/explicit-function-return-type': 'off',
+      '@typescript-eslint/ban-ts-comment': 'off',
+    },
+  },
+
+  // JS files (examples only) – Node globals, relax some rules
+  {
+    files: ['examples/**/examples/**/*.js'],
+    languageOptions: {
+      globals: {
+        ...globals.node,
+      },
+    },
+    plugins: {
+      prettier,
+      import: importPlugin,
+      jest,
+    },
+    rules: {
+      'no-console': 'off',
+      'prettier/prettier': 'error',
+      '@typescript-eslint/no-require-imports': 'off',
+    },
+  },
+]);