Bump TS to 5.8

Author: NullVoxPopuli

files/package.json

@@ -73,7 +73,7 @@
     "rollup": "^4.22.5",
     "testem": "^3.15.1",<% if (typescript) { %>
     "typescript-eslint": "^8.19.1",
-    "typescript": "~5.6.0",<% } %>
+    "typescript": "~5.8.3",<% } %>
     "vite": "^6.2.4"
   },
   "ember": {