Better integrate latest eslint version

Makefile

@@ -32,11 +32,12 @@ firefox: dist/build/uBlock0.firefox
 dist/build/uBlock0.npm: tools/make-nodejs.sh $(sources) $(platform) $(assets)
 	tools/make-npm.sh
 
-# Build the Node.js package.
-npm: dist/build/uBlock0.npm
+# Dev tools
+npm: node_modules/
+	npm install
 
 lint: npm
-	cd dist/build/uBlock0.npm && npm run lint
+	npm run lint
 
 test: npm
 	cd dist/build/uBlock0.npm && npm run test

eslint.config.mjs

@@ -0,0 +1,51 @@
+import js from "@eslint/js";
+import globals from "globals";
+import json from "@eslint/json";
+
+import { includeIgnoreFile } from "@eslint/compat";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const gitignorePath = path.resolve(__dirname, ".gitignore");
+
+export default [ includeIgnoreFile(gitignorePath), {
+    files: ["**/*.js", "**/*.mjs"],
+    ...js.configs.recommended,
+}, {
+    files: ["**/*.js", "**/*.mjs"],
+    languageOptions: {
+        globals: {
+            ...globals.browser,
+            browser: "readonly",
+            chrome: "readonly",
+            vAPI: "readonly",
+        },
+        sourceType: "module",
+    },
+    rules: {
+        eqeqeq: ["warn", "always"],
+        indent: ["error", 4, {
+            ignoredNodes: [
+                "Program > BlockStatement",
+                "Program > ExpressionStatement > CallExpression > ArrowFunctionExpression > BlockStatement",
+                "Program > ExpressionStatement > CallExpression > FunctionExpression > BlockStatement",
+                "Program > IfStatement > BlockStatement",
+                "Program > VariableDeclaration > VariableDeclarator > CallExpression > ArrowFunctionExpression > BlockStatement",
+                "CallExpression > MemberExpression",
+                "ArrayExpression > *",
+                "ObjectExpression > *",
+            ],
+        }],
+        "no-control-regex": "off",
+        "no-empty": "off",
+        "sort-imports": "error",
+        "strict": "error",
+    },
+}, {
+    files: ["**/*.json"],
+    ignores: ["package-lock.json"],
+    language: "json/json",
+    ...json.configs.recommended,
+} ];