fix EventEmitter undefined on React Native 0.64 (#1351)

* fix EventEmitter undefined on React Native 0.64

* fix bug on react-native-test.js

Author: bduyng

src/EventEmitter.js

@@ -10,7 +10,7 @@
  */
 
 if (process.env.PARSE_BUILD === 'react-native') {
-  const EventEmitter = require('../../../react-native/Libraries/vendor/emitter/EventEmitter');
+  const EventEmitter = require('../../../react-native/Libraries/vendor/emitter/_EventEmitter');
   EventEmitter.prototype.on = EventEmitter.prototype.addListener;
   module.exports = EventEmitter;
 } else {

src/__tests__/react-native-test.js

@@ -10,7 +10,7 @@ jest.dontMock('../ParseObject');
 jest.dontMock('../Storage');
 
 jest.mock(
-  '../../../../react-native/Libraries/vendor/emitter/EventEmitter',
+  '../../../../react-native/Libraries/vendor/emitter/_EventEmitter',
   () => {
     return {
       prototype: {
@@ -21,7 +21,7 @@ jest.mock(
   { virtual: true }
 );
 
-const mockEmitter = require('../../../../react-native/Libraries/vendor/emitter/EventEmitter');
+const mockEmitter = require('../../../../react-native/Libraries/vendor/emitter/_EventEmitter');
 const CoreManager = require('../CoreManager');
 
 describe('React Native', () => {