message: [bugfix] Toast: fix instance when SSR
diff: @@ -20,6 +20,11 @@ let singleton = true;
  let currentOptions = { ...defaultOptions };
  function createInstance() {
  + /* istanbul ignore if */
  + if (isServer) {
  + return {};
  + }
  +
  if (!queue.length || !singleton) {
  const toast = new (Vue.extend(VueToast))({
  el: document.createElement('div')
  @@ -37,11 +42,6 @@ function transformer(options) {
  }
  function Toast(options = {}) {
  - /* istanbul ignore if */
  - if (isServer) {
  - return;
  - }
  -
  const toast = createInstance();
  options = {
  