UEA-PRODEM

node_modules/browserslist/index.js

@@ -255,10 +255,14 @@ function normalizeAndroidVersions(androidVersions, chromeVersions) {
     .concat(chromeVersions.slice(iFirstEvergreen))
 }
 
+var DANGEROUS_KEYS = ['__proto__', 'constructor', 'prototype']
+
 function copyObject(obj) {
   var copy = {}
   for (var key in obj) {
-    copy[key] = obj[key]
+    if (DANGEROUS_KEYS.indexOf(key) === -1) {
+      copy[key] = obj[key]
+    }
   }
   return copy
 }