[FSSDK-9965] fix critical dependbot alerts (#896)

Author: raju-opti

lib/optimizely/index.tests.js

@@ -23,7 +23,6 @@ import Optimizely from './';
 import OptimizelyUserContext from '../optimizely_user_context';
 import { OptimizelyDecideOption } from '../shared_types';
 import AudienceEvaluator from '../core/audience_evaluator';
-import bluebird from 'bluebird';
 import * as bucketer from '../core/bucketer';
 import * as projectConfigManager from '../core/project_config/project_config_manager';
 import * as enums from '../utils/enums';
@@ -93,7 +92,7 @@ describe('lib/optimizely', function() {
     var stubErrorHandler = { handleError: function() {} };
     var stubEventDispatcher = {
       dispatchEvent: function() {
-        return bluebird.resolve(null);
+        return Promise.resolve(null);
       },
     };
     var createdLogger = logger.createLogger({ logLevel: LOG_LEVEL.INFO });