DEV: Bump dependencies and fix linting (#42)

Author: davidtaylorhq

package.json

@@ -1,15 +1,16 @@
 {
   "private": true,
   "devDependencies": {
-    "@discourse/lint-configs": "2.2.2",
-    "ember-template-lint": "6.0.0",
-    "eslint": "9.15.0",
+    "@discourse/lint-configs": "2.4.0",
+    "ember-template-lint": "6.1.0",
+    "eslint": "9.19.0",
     "prettier": "2.8.8"
   },
   "engines": {
-    "node": ">= 18",
+    "node": ">= 22",
     "npm": "please-use-pnpm",
     "yarn": "please-use-pnpm",
-    "pnpm": ">= 9"
-  }
+    "pnpm": "9.x"
+  },
+  "packageManager": "[email protected]"
 }