Express addition

node_modules/core-js/modules/_same-value.js

@@ -0,0 +1,5 @@
+// 7.2.9 SameValue(x, y)
+module.exports = Object.is || function is(x, y) {
+  // eslint-disable-next-line no-self-compare
+  return x === y ? x !== 0 || 1 / x === 1 / y : x != x && y != y;
+};