TypeError thrown if dispatched method resolves with a string

[janeysaur]

Ran into an issue with this line: https://github.com/respond-framework/rudy/blob/master/packages/rudy/src/core/createRequest.js#L166

      ...
    return Promise.resolve(dispatch(action)) // dispatch transformed action
      .then((res) => {
        ...
=>      if (res) res._dispatched = true // tell `middleware/call/index.js` to NOT automatically dispatch callback returns

        return res
      })
  }```

when my dispatched method resolved with a string return value.