Migrate to neostandard and eslint@9

.github/FUNDING.yml

@@ -1,4 +1,3 @@
 custom:
   - https://github.com/sponsors/eslint
-  - https://github.com/sponsors/standard
   - https://donate.mozilla.org/

CONTRIBUTING.md

@@ -22,9 +22,7 @@ All pull requests must be compatible with the repository license (GPL-3.0).
 
 ### Style guide
 
-[![js-semistandard-style](https://raw.githubusercontent.com/standard/semistandard/master/badge.svg)](https://github.com/standard/semistandard)
-
-This project follows JavaScript Semi-Standard Style via [`eslint-config-semistandard`](https://github.com/standard/eslint-config-semistandard).
+This project follows JavaScript Standard Style with semicolons via [`neostandard`](https://github.com/neostandard/neostandard).
 
 Stylesheets should aim to follow Nicolas Gallagher's [Idiomatic CSS](https://github.com/necolas/idiomatic-css#readme) principles. Additionally, element classnames and IDs should be `kebab-case`, to fit with the automatic casing of [`data-*` attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Global_attributes/data-*).
 

eslint.config.js

@@ -0,0 +1,29 @@
+import neostandard, { plugins, resolveIgnoresFromGitignore } from 'neostandard';
+import globals from 'globals';
+import jsdoc from 'eslint-plugin-jsdoc';
+
+export default [
+  ...neostandard({
+    globals: {
+      ...globals.browser,
+      ...globals.es2021,
+      ...globals.webextensions,
+      ...globals.jquery
+    },
+    semi: true,
+    ignores: [...resolveIgnoresFromGitignore(), 'src/lib/*']
+  }),
+  jsdoc.configs['flat/recommended'],
+  {
+    rules: {
+      ...plugins['import-x'].flatConfigs.recommended.rules,
+      'import-x/no-cycle': 'error'
+    }
+  },
+  {
+    files: ['src/main_world/*'],
+    rules: {
+      'jsdoc/require-jsdoc': 'off'
+    }
+  }
+];