Could you upgrade socketio-client to v4.x ?

**Node version**:
**Sails version** _(sails)_:
**ORM hook version** _(sails-hook-orm)_:
**Sockets hook version** _(sails-hook-sockets)_:
**Organics hook version** _(sails-hook-organics)_:
**Grunt hook version** _(sails-hook-grunt)_:
**Uploads hook version** _(sails-hook-uploads)_:
**DB adapter & version** _(e.g. sails-mysql@5.55.5)_:
**Skipper adapter & version** _(e.g. skipper-s3@5.55.5)_:

No source files, tests, versions, or entry points are identified in the issue. Start by locating the socketio-client dependency and checking the project's supported Node and Sails versions, then verify that the upgrade works with the existing sockets integration and its tests or basic usage checks.

Written by the indexing model from the issue text.