use standard URLSearchParams insead of custom functions

node_modules/i18next-xhr-backend/dist/es/utils.js

@@ -0,0 +1,25 @@
+var arr = [];
+var each = arr.forEach;
+var slice = arr.slice;
+
+export function defaults(obj) {
+  each.call(slice.call(arguments, 1), function (source) {
+    if (source) {
+      for (var prop in source) {
+        if (obj[prop] === undefined) obj[prop] = source[prop];
+      }
+    }
+  });
+  return obj;
+}
+
+export function extend(obj) {
+  each.call(slice.call(arguments, 1), function (source) {
+    if (source) {
+      for (var prop in source) {
+        obj[prop] = source[prop];
+      }
+    }
+  });
+  return obj;
+}