Remove action bug in MuRDAMap

[liuxuefei]

After dispatch a remove action in MuRDAMap, if using replica.state(stateA) in change listener, the state in replica is not correctly copied into stateA

this.replica.configure({
    change: (newState) => {
        this.replica.state(this.state);
        // this.state is old state, but newState is correct
    },
});

[Mikola Lysenko]

Probably the issue is murdamap's store is broken. It should be removing states from the old state, but it's not.