add some packages

node_modules/core-js/modules/_microtask.js

@@ -0,0 +1,68 @@
+var global = require('./_global');
+var macrotask = require('./_task').set;
+var Observer = global.MutationObserver || global.WebKitMutationObserver;
+var process = global.process;
+var Promise = global.Promise;
+var isNode = require('./_cof')(process) == 'process';
+
+module.exports = function () {
+  var head, last, notify;
+
+  var flush = function () {
+    var parent, fn;
+    if (isNode && (parent = process.domain)) parent.exit();
+    while (head) {
+      fn = head.fn;
+      head = head.next;
+      try {
+        fn();
+      } catch (e) {
+        if (head) notify();
+        else last = undefined;
+        throw e;
+      }
+    } last = undefined;
+    if (parent) parent.enter();
+  };
+
+  // Node.js
+  if (isNode) {
+    notify = function () {
+      process.nextTick(flush);
+    };
+  // browsers with MutationObserver, except iOS Safari - https://github.com/zloirock/core-js/issues/339
+  } else if (Observer && !(global.navigator && global.navigator.standalone)) {
+    var toggle = true;
+    var node = document.createTextNode('');
+    new Observer(flush).observe(node, { characterData: true }); // eslint-disable-line no-new
+    notify = function () {
+      node.data = toggle = !toggle;
+    };
+  // environments with maybe non-completely correct, but existent Promise
+  } else if (Promise && Promise.resolve) {
+    var promise = Promise.resolve();
+    notify = function () {
+      promise.then(flush);
+    };
+  // for other environments - macrotask based on:
+  // - setImmediate
+  // - MessageChannel
+  // - window.postMessag
+  // - onreadystatechange
+  // - setTimeout
+  } else {
+    notify = function () {
+      // strange IE + webpack dev server bug - use .call(global)
+      macrotask.call(global, flush);
+    };
+  }
+
+  return function (fn) {
+    var task = { fn: fn, next: undefined };
+    if (last) last.next = task;
+    if (!head) {
+      head = task;
+      notify();
+    } last = task;
+  };
+};