Update devDependencies

Author: renovate[bot]

ember-composable-helpers/package.json

@@ -81,7 +81,7 @@
     "@types/rsvp": "^4.0.9",
     "babel-plugin-ember-template-compilation": "^2.3.0",
     "concurrently": "^9.1.2",
-    "ember-source": "~5.8.0",
+    "ember-source": "~5.12.0",
     "ember-template-lint": "^6.1.0",
     "eslint": "^9.21.0",
     "eslint-config-prettier": "^10.0.2",
@@ -93,7 +93,7 @@
     "prettier-plugin-ember-template-tag": "^2.0.4",
     "rollup": "^4.34.9",
     "rollup-plugin-copy": "^3.5.0",
-    "typescript": "~5.8.2",
+    "typescript": "~5.9.0",
     "typescript-eslint": "^8.25.0",
     "webpack": "^5.88.1"
   },