message: request
  Converting opts.data in query-string if this is GET request.
diff: +import querystring from './querystring';
  +
  const defaultOptions = {
  method: 'GET',
  data: null
  @@ -16,6 +18,11 @@ function makeRequest (url, options) {
  const error = new Error('Request was aborted');
  const request = getXMLHttpRequest();
  const opts = Object.assign({}, defaultOptions, options);
  +
  + if (opts.method.toLowerCase() === 'get') {
  + url += `?${querystring.create(opts.data)}`;
  + }
  +
  const requestPromise = new Promise((resolve, reject) => {
  if (!request) {
  reject(new Error('XMLHttpRequest not supported'));
  