build(deps-dev): migrate to eslint flat config

.github/dependabot.yml

@@ -20,7 +20,7 @@ updates:
                   - "@commitlint*"
           eslint:
               patterns:
-                  - "@eslint-community*"
+                  - "@eslint*"
                   - "eslint*"
           fastify-core:
               patterns:

.vscode/settings.json

@@ -1,6 +1,7 @@
 {
 	"editor.defaultFormatter": "esbenp.prettier-vscode",
 	"editor.formatOnSave": true,
+	"eslint.useFlatConfig": true,
 	"files.eol": "\n",
 	"gitlens.telemetry.enabled": false,
 	"[javascript]": {

eslint.config.mjs

@@ -0,0 +1,19 @@
+import { fileURLToPath, URL } from "node:url";
+import { includeIgnoreFile } from "@eslint/compat";
+import { defineConfig } from "eslint/config";
+
+// Configs
+import fdawgs from "@fdawgs/eslint-config";
+
+const gitignorePath = fileURLToPath(new URL(".gitignore", import.meta.url));
+
+const config = defineConfig([
+	// Include ignore file to prevent linting of files in .gitignore
+	includeIgnoreFile(gitignorePath),
+	{
+		files: ["**/*.js", "**/*.jsx"],
+		extends: [fdawgs],
+	},
+]);
+
+export default config;

package.json

@@ -30,15 +30,15 @@
 		"node": ">=20"
 	},
 	"scripts": {
-		"lint": "eslint . --cache --ext js,jsx --ignore-path .gitignore",
 		"lint:fix": "npm run lint -- --fix",
 		"lint:licenses": "licensee --errors-only --production",
-		"lint:prettier": "prettier . -c -u",
 		"lint:prettier:fix": "prettier . -w -u",
+		"lint:prettier": "prettier . -c -u",
+		"lint": "eslint . --cache",
 		"prepare": "husky",
-		"test": "npm run lint && npm run lint:prettier && npm run test:unit",
+		"test:unit:coverage": "c8 --100 --all --src='src/' -r=lcovonly -r=text npm run test:unit",
 		"test:unit": "node --test",
-		"test:unit:coverage": "c8 --100 --all --src='src/' -r=lcovonly -r=text npm run test:unit"
+		"test": "npm run lint && npm run lint:prettier && npm run test:unit"
 	},
 	"commitlint": {
 		"extends": [
@@ -48,16 +48,10 @@
 	"devDependencies": {
 		"@commitlint/cli": "^19.6.1",
 		"@commitlint/config-conventional": "^19.6.0",
-		"@eslint-community/eslint-plugin-eslint-comments": "^4.4.1",
+		"@eslint/compat": "^1.3.0",
+		"@fdawgs/eslint-config": "^1.0.0",
 		"c8": "^10.1.3",
-		"eslint": "^8.57.1",
-		"eslint-config-airbnb-base": "^15.0.0",
-		"eslint-config-prettier": "^9.1.0",
-		"eslint-plugin-import": "^2.31.0",
-		"eslint-plugin-jsdoc": "^50.6.1",
-		"eslint-plugin-promise": "^7.2.1",
-		"eslint-plugin-regexp": "^2.7.0",
-		"eslint-plugin-security": "^3.0.1",
+		"eslint": "^9.29.0",
 		"fastify": "^5.0.0",
 		"husky": "^9.1.7",
 		"licensee": "^11.1.1",

src/index.test.js

@@ -1,11 +1,12 @@
 "use strict";
 
+// eslint-disable-next-line n/no-unsupported-features/node-builtins -- Tests, not in distributed code
 const { after, before, describe, it } = require("node:test");
 const Fastify = require("fastify");
 const plugin = require(".");
 
 describe("JSON-To-XML plugin", () => {
 	/** @type {Fastify.FastifyInstance} */
 	let server;
 
 	const resBody = {