feat: add polyfills insertion for ES Next used features

libraries/stdlib/js-ir/runtime/math.kt

@@ -5,8 +5,8 @@
 @file:JsQualifier("Math")
 package kotlin.js
 
-@JsNativeImplementation("""
-if (typeof Math == "object" && Math !== null & typeof Math.imul === "undefined") {
+@JsPolyfill("""
+if (typeof Math.imul === "undefined") {
   Math.imul = function imul(a, b) {
     return ((a & 0xffff0000) * (b & 0xffff) + (a & 0xffff) * (b | 0)) | 0; 
   }