refactor: update linting configuration and remove eslintConfig from package.json

- Changed lint script to target JavaScript files in the src directory.
- Removed eslintConfig section as it is no longer needed.

action.yml

@@ -14,5 +14,5 @@ inputs:
     required: false
     
 runs:
-  using: 'node20'
+  using: 'node21'
   main: 'dist/index.js'

eslint.config.js

@@ -2,24 +2,16 @@ import { FlatCompat } from "@eslint/eslintrc";
 import path from "path";
 import { fileURLToPath } from "url";
 
-import js from "@eslint/js";
 import github from "eslint-plugin-github";
 import jest from "eslint-plugin-jest";
 import babelParser from "@babel/eslint-parser";
 import prettier from "eslint-plugin-prettier";
+import importPlugin from "eslint-plugin-import";
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = path.dirname(__filename);
 
-const compat = new FlatCompat({
-  baseDirectory: __dirname,
-  resolvePluginsRelativeTo: __dirname,
-});
-
 export default [
-  // Convert legacy configs
-  ...compat.extends("prettier"),
-
   {
     files: ["**/*.js", "**/*.mjs", "**/*.cjs"],
     ignores: [
@@ -48,6 +40,7 @@ export default [
       github,
       jest,
       prettier,
+      import: importPlugin,
     },
     rules: {
       camelcase: "off",
@@ -62,8 +55,4 @@ export default [
       semi: "off",
     },
   },
-
-  js.configs.recommended,
-  github.configs.recommended,
-  jest.configs.recommended,
 ];

package.json

@@ -29,16 +29,13 @@
     "bundle": "npm run format:write && npm run package",
     "format:write": "prettier --write **/*.js",
     "format:check": "prettier --check **/*.js",
-    "lint": "npx eslint . -c ./.github/linters/eslint.config.js",
+    "lint": "eslint src/**/*.js",
     "package": "ncc build src/index.js --license licenses.txt",
     "package:watch": "npm run package -- --watch",
     "test": "jest",
     "all": "npm run format:write && npm run lint && npm run package"
   },
   "license": "MIT",
-  "eslintConfig": {
-    "extends": "./.github/linters/eslint.config.js"
-  },
   "jest": {
     "verbose": true,
     "clearMocks": true,