add some packages

node_modules/core-js/modules/_iter-detect.js

@@ -0,0 +1,22 @@
+var ITERATOR = require('./_wks')('iterator');
+var SAFE_CLOSING = false;
+
+try {
+  var riter = [7][ITERATOR]();
+  riter['return'] = function () { SAFE_CLOSING = true; };
+  // eslint-disable-next-line no-throw-literal
+  Array.from(riter, function () { throw 2; });
+} catch (e) { /* empty */ }
+
+module.exports = function (exec, skipClosing) {
+  if (!skipClosing && !SAFE_CLOSING) return false;
+  var safe = false;
+  try {
+    var arr = [7];
+    var iter = arr[ITERATOR]();
+    iter.next = function () { return { done: safe = true }; };
+    arr[ITERATOR] = function () { return iter; };
+    exec(arr);
+  } catch (e) { /* empty */ }
+  return safe;
+};