Remove isPlainObject checking in dispatch method

[niba]

I'm writing a react/redux project in TypeScript and I would like to have a little different structure of actions and reducers.

Here is the example:

abstract class Action {
    type: string;
}

class ActionOne extends Action {
     constructor(public one: string) {
            super();
            this.type = "TypeOne";
        }
}

class ActionTwo extends Action {
     constructor(public two: number) {
            super();
            this.type = "TypeTwo";
        }
}

and my reducer method

function reducer(state, action: Action) {
    if(action instanceof ActionOne) {
        action.one; // works
                action.two; // error
    } else if (action instanceof ActionTwo) {
        action.one; // error
                action.two; // works
    } else {
        return state;
    }
}

Thank to these changes and to type guard feature I have intellisense and type checking inside of each if/else body.
The only problem with this solution is that dispatch method checks if the action object is the plain object which in my case is not true.

[gaearon]

Please see the discussion in #992.

[gaearon]

Nice workaround for TypeScript 1.6: #992 (comment)

[niba]

@gaearon Awesome! Thanks!