chore: update eslint to version 9.39.2

Author: GrantBirki

.eslintignore

@@ -0,0 +1,43 @@
+import js from '@eslint/js'
+import globals from 'globals'
+
+/** @type {import("eslint").Linter.FlatConfig[]} */
+export default [
+  // Centralize ignores here (ESLint v9 no longer supports `.eslintignore`).
+  {
+    ignores: ['dist/**', 'node_modules/**', 'coverage/**', 'badges/**']
+  },
+
+  // Equivalent of `extends: "eslint:recommended"` in flat-config land.
+  js.configs.recommended,
+
+  // Project-wide JS settings (ESM + Node).
+  {
+    files: ['**/*.js'],
+    languageOptions: {
+      ecmaVersion: 2022,
+      sourceType: 'module',
+      globals: {
+        ...globals.es2022,
+        ...globals.node
+      }
+    }
+  },
+
+  // Vitest globals for tests/config files.
+  {
+    files: ['**/__tests__/**/*.js', '**/*.test.js', 'vitest.config.js'],
+    languageOptions: {
+      globals: {
+        ...globals.es2022,
+        ...globals.node,
+        vi: 'readonly',
+        describe: 'readonly',
+        test: 'readonly',
+        expect: 'readonly',
+        beforeEach: 'readonly',
+        afterEach: 'readonly'
+      }
+    }
+  }
+]