chore(eslint): update to version 9

Removed the smart-quote plugin as it was incompatible with the new
version of eslint and looked outdated.

eslint.config.mjs

@@ -0,0 +1,110 @@
+import js from '@eslint/js';
+import babelParser from '@babel/eslint-parser';
+import reactPlugin from 'eslint-plugin-react';
+import prettierPlugin from 'eslint-plugin-prettier';
+import storybookPlugin from 'eslint-plugin-storybook';
+import typeScriptEsLint from '@typescript-eslint/eslint-plugin';
+import globals from 'globals';
+
+const pharosConfig = {
+  ignores: [
+    'node_modules/',
+    'dist/',
+    'lib/',
+    '.storybook-static/',
+    'packages/pharos/coverage/**/*.js',
+    'packages/pharos/src/styles/**/*.ts',
+    'packages/pharos-site/public/',
+    'packages/pharos-site/.cache/',
+    '**/*.css.ts',
+  ],
+  languageOptions: {
+    parser: babelParser,
+    globals: {
+      ...globals.browser,
+      ...globals.node,
+    },
+    parserOptions: {
+      ecmaVersion: 2020,
+      sourceType: 'module',
+      requireConfigFile: false,
+      ecmaFeatures: {
+        jsx: true,
+      },
+      babelOptions: {
+        plugins: ['@babel/plugin-syntax-import-assertions'],
+        presets: ['@babel/preset-react'],
+      },
+    },
+  },
+  plugins: {
+    reactPlugin,
+    prettierPlugin,
+    storybookPlugin,
+    typeScriptEsLint,
+  },
+  settings: {
+    react: {
+      version: 'detect',
+    },
+  },
+  rules: {
+    'react/react-in-jsx-scope': 'off',
+  },
+};
+
+const tsConfig = {
+  files: ['*.ts'],
+  parser: '@typescript-eslint/parser',
+  parserOptions: {
+    project: './packages/**/tsconfig.json',
+  },
+  extends: [
+    'plugin:@typescript-eslint/recommended',
+    'plugin:wc/recommended',
+    'plugin:lit/recommended',
+  ],
+  rules: {
+    'no-unused-vars': 'off',
+    '@typescript-eslint/consistent-type-imports': ['error'],
+    '@typescript-eslint/no-unused-vars': ['error'],
+    'lit/no-legacy-template-syntax': 'off',
+  },
+};
+
+const tsxConfig = {
+  files: ['*.tsx'],
+  parser: '@typescript-eslint/parser',
+  parserOptions: {
+    project: './packages/**/tsconfig.json',
+  },
+  extends: [
+    'plugin:jsx-a11y/recommended',
+    'plugin:react/recommended',
+    'plugin:react-hooks/recommended',
+    'plugin:@typescript-eslint/recommended',
+  ],
+  rules: {
+    'no-unused-vars': 'off',
+    '@typescript-eslint/consistent-type-imports': ['error'],
+    '@typescript-eslint/no-unused-vars': ['error'],
+    'react/display-name': 'off',
+    'react/prop-types': 'off',
+    'react/jsx-uses-react': 'off',
+    'react/react-in-jsx-scope': 'off',
+  },
+};
+
+const mdxConfig = {
+  files: ['*.mdx'],
+  extends: ['plugin:mdx/recommended', 'plugin:react/recommended'],
+  settings: {
+    'mdx/code-blocks': true,
+  },
+  rules: {
+    'react/no-unescaped-entities': 'off',
+    'react/jsx-no-undef': 'off',
+  },
+};
+
+export default [js.configs.recommended, pharosConfig, tsConfig, tsxConfig, mdxConfig];

package.json

@@ -82,17 +82,17 @@
     "all-contributors-cli": "^6.26.1",
     "concurrently": "^8.2.2",
     "cssnano": "^7.0.1",
-    "eslint": "^8.57.0",
+    "eslint": "^9.2.0",
     "eslint-config-prettier": "^9.1.0",
     "eslint-plugin-jsx-a11y": "^6.8.0",
     "eslint-plugin-lit": "^1.12.0",
     "eslint-plugin-mdx": "^1.17.1",
-    "eslint-plugin-no-smart-quotes": "^1.3.0",
     "eslint-plugin-prettier": "^5.1.3",
     "eslint-plugin-react": "^7.34.1",
     "eslint-plugin-react-hooks": "^4.6.2",
     "eslint-plugin-storybook": "^0.8.0",
     "eslint-plugin-wc": "^2.1.0",
+    "globals": "^15.2.0",
     "husky": "^9.0.11",
     "lint-staged": "^15.2.2",
     "lit": "^2.8.0",