chore: update dependency eslint to v9

Based on work in loopbackio/loopback-connector#516

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Signed-off-by: Rifa Achrinza <[email protected]>

Author: achrinza

.editorconfig

@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: FSFAP
+# SPDX-FileCopyrightText: Copyright (c) 2024 Rifa Achrinza
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+charset = utf-8
+indent_style = space
+indent_size = 2
+max_line_length = 80

.gitignore

@@ -31,3 +31,8 @@ node_modules
 
 # Optional REPL history
 .node_repl_history
+
+# Code editors
+\#*#
+*~
+.#*

eslint.config.mjs

@@ -0,0 +1,21 @@
+// SPDX-FileCopyrightText: Copyright LoopBack contributors 2024.
+// SPDX-License-Identifier: MIT
+import {FlatCompat} from '@eslint/eslintrc';
+const compat = new FlatCompat({
+  baseDirectory: import.meta.dirname,
+});
+
+export default [
+  ...compat.extends('loopback'),
+  {
+    languageOptions: {
+      ecmaVersion: 'latest',
+    },
+  },
+  {
+    files: ['**/*.js'],
+    languageOptions: {
+      sourceType: 'commonjs',
+    },
+  },
+];