Reverted version change.

Author: przemyslaw-zan

packages/ckeditor5-dev-tests/package.json

@@ -71,7 +71,7 @@
     "sinon": "^9.2.4",
     "sinon-chai": "^3.5.0",
     "socket.io": "^4.0.0",
-    "typescript": "^5.6.0",
+    "typescript": "5.0.4",
     "upath": "^2.0.1",
     "webpack": "^5.94.0"
   },