build(deps-dev): bump typescript from 5.9.3 to 6.0.2

Bumps [typescript](https://github.com/microsoft/TypeScript) from 5.9.3 to 6.0.2.
- [Release notes](https://github.com/microsoft/TypeScript/releases)
- [Commits](microsoft/TypeScript@v5.9.3...v6.0.2)

---
updated-dependencies:
- dependency-name: typescript
  dependency-version: 6.0.2
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

fern/package.json

@@ -8,6 +8,6 @@
   "devDependencies": {
     "fern-api": "4.43.1",
     "@types/node": "25.5.0",
-    "typescript": "5.9.3"
+    "typescript": "6.0.2"
   }
 }

heyapi/package.json

@@ -6,6 +6,6 @@
   },
   "devDependencies": {
     "@hey-api/openapi-ts": "0.92.4",
-    "typescript": "5.9.3"
+    "typescript": "6.0.2"
   }
 }

package-lock.json

@@ -7,6 +7,6 @@
   ],
   "devDependencies": {
     "prettier": "3.8.1",
-    "typescript": "5.9.3"
+    "typescript": "6.0.2"
   }
 }