ci: remove unit testing (#198)

* ci(test): remove `test-package` job

* test: remove testing using Jest

* test(eslint): remove `parserOptions` entry

package.json

@@ -4,8 +4,7 @@
   "scripts": {
     "build": "tsc && ncc build src/index.mjs -o dist",
     "format": "prettier --write --cache . !dist !README.md",
-    "lint": "eslint --ignore-path .gitignore .",
-    "test": "tsc && jest"
+    "lint": "eslint --ignore-path .gitignore ."
   },
   "dependencies": {
     "@actions/core": "^1.10.1",
@@ -21,7 +20,6 @@
     "eslint-config-prettier": "^9.1.0",
     "eslint-plugin-json-files": "^4.1.0",
     "eslint-plugin-tsdoc": "^0.2.17",
-    "jest": "^29.7.0",
     "prettier": "^3.2.5",
     "typescript": "^5.3.3"
   },