chore(deps): update dependency typescript to v6

Author: renovate[bot]

packages/openapi-typescript-helpers/package.json

@@ -34,6 +34,6 @@
     "lint:ts": "tsc --noEmit"
   },
   "devDependencies": {
-    "typescript": "5.9.3"
+    "typescript": "6.0.2"
   }
 }

packages/openapi-typescript/package.json

@@ -59,7 +59,7 @@
     "version": "pnpm run build"
   },
   "peerDependencies": {
-    "typescript": "^5.x"
+    "typescript": "^5.x || ^6.0.0"
   },
   "dependencies": {
     "@redocly/openapi-core": "^1.34.6",