chore: bump engine.io-parser version

See also: https://github.com/socketio/engine.io-protocol#difference-between-v3-and-v4

Release: https://github.com/socketio/engine.io-parser/releases/tag/4.0.0
Diff: https://github.com/socketio/engine.io-parser/compare/2.2.0...4.0.0