Update README for v6 and clean up dev dependencies

README.md

@@ -12,6 +12,10 @@ This action provides the following functionality for GitHub Actions users:
 - Registering problem matchers for error output
 - Configuring authentication for GPR or npm
 
+## Breaking changes in V7
+
+- **Migrated to ESM** to enable support for the latest `@actions/*` package versions.
+
 ## Breaking changes in V6
 
 - Caching is now automatically enabled for npm projects when either the `devEngines.packageManager` field or the top-level `packageManager` field in `package.json` is set to `npm`. For other package managers, such as Yarn and pnpm, caching is disabled by default and must be configured manually using the `cache` input.

eslint.config.mjs

@@ -49,6 +49,7 @@ export default [
       ],
       'no-control-regex': 'off',
       'no-constant-condition': ['error', {checkLoops: false}],
+      'no-undef': 'off',
       'no-useless-assignment': 'off',
       'n/no-extraneous-import': 'error'
     }

package-lock.json

@@ -22,7 +22,6 @@
       "devDependencies": {
         "@eslint/js": "^10.0.1",
         "@jest/globals": "^30.4.1",
-        "@types/jest": "^30.0.0",
         "@types/node": "^26.0.0",
         "@types/semver": "^7.7.0",
         "@typescript-eslint/eslint-plugin": "^8.62.0",
@@ -2028,17 +2027,6 @@
         "@types/istanbul-lib-report": "*"
       }
     },
-    "node_modules/@types/jest": {
-      "version": "30.0.0",
-      "resolved": "https://registry.npmjs.org/@types/jest/-/jest-30.0.0.tgz",
-      "integrity": "sha512-XTYugzhuwqWjws0CVz8QpM36+T+Dz5mTEBKhNs/esGLnCIlGdRy+Dq78NRjd7ls7r8BC8ZRMOrKlkO1hU0JOwA==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "expect": "^30.0.0",
-        "pretty-format": "^30.0.0"
-      }
-    },
     "node_modules/@types/json-schema": {
       "version": "7.0.15",
       "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.15.tgz",

package.json

@@ -42,7 +42,6 @@
   "devDependencies": {
     "@eslint/js": "^10.0.1",
     "@jest/globals": "^30.4.1",
-    "@types/jest": "^30.0.0",
     "@types/node": "^26.0.0",
     "@types/semver": "^7.7.0",
     "@typescript-eslint/eslint-plugin": "^8.62.0",