Breaking: move to node 18, pnpm, node test runner

package.json

@@ -1,13 +1,17 @@
 {
   "name": "eleventy-plugin-code-demo",
   "version": "1.0.1",
+  "type": "module",
+  "engines": {
+    "node": ">=18"
+  },
+  "main": "src/index.js",
   "description": "Add interactive code demos to an Eleventy site with iframes",
   "keywords": [
     "eleventy",
     "eleventy-plugin",
     "iframe"
   ],
-  "main": "src/index.js",
   "files": [
     "src/index.js",
     "src/utils.js",
@@ -27,8 +31,8 @@
   "license": "MIT",
   "scripts": {
     "dev": "cross-env ELEVENTY_ENV=development npx @11ty/eleventy --serve --incremental",
-    "test": "npx jest",
-    "test:watch": "npx jest --watch"
+    "test": "node --test",
+    "test:watch": "pnpm run test --watch"
   },
   "dependencies": {
     "@minify-html/node": "0.10.3",
@@ -44,18 +48,17 @@
     "eslint-config-prettier": "^8.5.0",
     "eslint-plugin-prettier": "^4.2.1",
     "husky": "4.3.0",
-    "jest": "^29.3.1",
     "lint-staged": "12.1.7",
     "prettier": "^2.7.1"
   },
   "husky": {
     "hooks": {
       "pre-commit": "lint-staged",
-      "post-checkout": "yarn"
+      "post-checkout": "pnpm install"
     }
   },
   "lint-staged": {
-    "*.js": "yarn run lint:js:fix"
+    "*.js": "pnpm run lint:js:fix"
   },
-  "packageManager": "[email protected]+sha1.1959a18351b811cdeedbd484a8f86c3cc3bbaf72"
+  "packageManager": "[email protected]+sha512.cce0f9de9c5a7c95bef944169cc5dfe8741abfb145078c0d508b868056848a87c81e626246cb60967cbd7fd29a6c062ef73ff840d96b3c86c40ac92cf4a813ee"
 }