Remove usage of RN's polyfillGlobal

.circleci/config.yml

@@ -142,9 +142,19 @@ jobs:
           name: Lint
           command: yarn lint
   test-js:
+    parameters:
+      react-native-version:
+        type: string
+        default: ''
     executor: default
     steps:
       - *attach-workspace
+      - when:
+          condition: << parameters.react-native-version >>
+          steps:
+            - run:
+                name: Overriding react-native version
+                command: yarn add --dev react-native@<< parameters.react-native-version >>
       - run:
           name: Run Jest
           command: yarn test

__tests__/index-test.js

@@ -1,7 +1,3 @@
-jest.mock('react-native/Libraries/Utilities/PolyfillFunctions', () => ({
-  polyfillGlobal: jest.fn(),
-}));
-
 describe('Index', function () {
   it("shouldn't apply URL and URLSearchParams on import", () => {
     expect(global.REACT_NATIVE_URL_POLYFILL).toBeUndefined();

index.js

@@ -1,7 +1,5 @@
 import './js/ios10Fix';
 
-import {polyfillGlobal} from 'react-native/Libraries/Utilities/PolyfillFunctions';
-
 import {name, version} from './package.json';
 
 export * from './js/URL';
@@ -10,9 +8,6 @@ export * from './js/URLSearchParams';
 export function setupURLPolyfill() {
   global.REACT_NATIVE_URL_POLYFILL = `${name}@${version}`;
 
-  polyfillGlobal('URL', () => require('./js/URL').URL);
-  polyfillGlobal(
-    'URLSearchParams',
-    () => require('./js/URLSearchParams').URLSearchParams,
-  );
+  global.URL = require('./js/URL').URL;
+  global.URLSearchParams = require('./js/URLSearchParams').URLSearchParams;
 }