Add Object#fromEntries polyfill (with 6 lines of code)

packages/next-polyfill-module/src/index.js

@@ -94,3 +94,27 @@ if (!Promise.prototype.finally) {
     )
   }
 }
+
+/**
+ * Available in:
+ * Edge: never
+ * Firefox: 63
+ * Chrome: 73
+ * Safari: 12.1
+ *
+ * https://caniuse.com/mdn-javascript_builtins_object_fromentries
+ */
+// Modified from https://github.com/tc39/proposal-object-from-entries/blob/main/polyfill.js
+// Modified from https://github.com/feross/fromentries/blob/29b52a850bb3a47c390937631c2638edf3443942/index.js
+// License MIT
+if (!Object.fromEntries) {
+  Object.fromEntries = function (iterable) {
+    // Assume the input is either an iterable object or an array-like object
+    return Array.from(iterable).reduce(function (obj, entry) {
+      // https://github.com/tc39/proposal-object-from-entries/blob/e4837799c1586a07c101570b27997497e5290c22/polyfill.js#L9-L10
+      // contract is that entry has "0" and "1" keys, not that it is an array or iterable.
+      obj[entry[0]] = entry[1]
+      return obj
+    }, {})
+  }
+}