[feature/redux] Add support for helpers in redux-thunk actions

[langpavel]

_Work in Progress_

Support for isomorphic fetch and graphqlRequest
helpers in redux-thunk action creators.

Extracted (and refactored) from my private work for @bravo-kernel. Not tested in this form.

Proposed usage:

// src/actions/auth/logout.js
import {
  LOGOUT,
} from '../../constants';

const query = `
query {
  logout(logout: true)
}`;

export function logout() {
  return async (dispatch, _, { graphqlRequest }) => {
    await graphqlRequest(query);
    dispatch({ type: LOGOUT });
    return true;
  };
}

[langpavel]

Thanks! :-)

[bjackson]

How do I use these helpers?

[langpavel]

@bjackson See graphqlRequest helper on top of this PR