Fire the event listeners for state changes when updating locally with setState, rather than only when COGS responds

[tomdixon]

Currently, if…

• you have some state which is both writableByCogs and writableByClient
• you use useCogsStateValue to use the state in a React component
• you then update it with connection.setState

… then you will not get a re-render until the server responds with the updated state.

We should fire the event listeners for state changes when updating with setState, rather than only when COGS responds