add some packages

node_modules/core-js/modules/es6.math.tanh.js

@@ -0,0 +1,12 @@
+// 20.2.2.33 Math.tanh(x)
+var $export = require('./_export');
+var expm1 = require('./_math-expm1');
+var exp = Math.exp;
+
+$export($export.S, 'Math', {
+  tanh: function tanh(x) {
+    var a = expm1(x = +x);
+    var b = expm1(-x);
+    return a == Infinity ? 1 : b == Infinity ? -1 : (a - b) / (exp(x) + exp(-x));
+  }
+});