add all frontend files

node_modules/es-to-primitive/index.d.ts

@@ -0,0 +1,11 @@
+import ES5 from './es5';
+import ES6 from './es6';
+import ES2015 from './es2015';
+
+declare const ToPrimitive: typeof ES2015 & {
+    readonly ES5: typeof ES5;
+    /** @deprecated */
+    readonly ES6: typeof ES6;
+    readonly ES2015: typeof ES2015;
+};
+export = ToPrimitive;