test: utilize new flat ESLint configuration

.eslintrc.json

@@ -1,10 +0,0 @@
-{
-  "root": true,
-  "extends": ["eslint:recommended"],
-  "overrides": [
-    {
-      "files": ["**/*.ts"],
-      "extends": ["plugin:@typescript-eslint/recommended"]
-    }
-  ]
-}

.gitignore

@@ -1,6 +1,5 @@
 .*
 !.env.yarn
-!.eslint*
 !.git*
 
 node_modules/

eslint.config.js

@@ -0,0 +1,8 @@
+import eslint from "@eslint/js";
+
+export default [
+  eslint.configs.recommended,
+  {
+    ignores: [".*", "dist"],
+  },
+];

package.json

@@ -5,7 +5,7 @@
   "scripts": {
     "build": "ncc build src/index.ts",
     "format": "prettier --write --cache . !dist !README.md",
-    "lint": "eslint src",
+    "lint": "eslint .",
     "test": "jest"
   },
   "dependencies": {
@@ -13,6 +13,7 @@
     "@actions/exec": "^1.1.1"
   },
   "devDependencies": {
+    "@eslint/js": "^9.0.0",
     "@jest/globals": "^29.7.0",
     "@types/jest": "^29.5.12",
     "@types/node": "^20.11.30",

yarn.lock

@@ -493,6 +493,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@eslint/js@npm:^9.0.0":
+  version: 9.0.0
+  resolution: "@eslint/js@npm:9.0.0"
+  checksum: 10c0/ec3242a60a2525d2785d96d1e95b8060235f47f3b953aa81626968591ef8c1eb4f7f8b3647db2c97fdfa524eace949a5695be50521f64b8dcc4ed3b493ee409e
+  languageName: node
+  linkType: hard
+
 "@fastify/busboy@npm:^2.0.0":
   version: 2.1.0
   resolution: "@fastify/busboy@npm:2.1.0"
@@ -3866,6 +3873,7 @@ __metadata:
   dependencies:
     "@actions/core": "npm:^1.10.1"
     "@actions/exec": "npm:^1.1.1"
+    "@eslint/js": "npm:^9.0.0"
     "@jest/globals": "npm:^29.7.0"
     "@types/jest": "npm:^29.5.12"
     "@types/node": "npm:^20.11.30"