Fixed azure pipeline.

Author: phongcao

azure-pipelines.yml

@@ -7,7 +7,7 @@ trigger:
     - refs/tag/*
 
 pool:
-  vmImage: 'macOS-10.13'
+  vmImage: 'macOS-10.14'
 
 steps:
 - script: |
@@ -56,6 +56,8 @@ steps:
 - script: |
     pod install
     sudo cp -R ../node_modules/react-native-azurenotificationhub/ios Pods/RNAzureNotificationHub
+    sudo chown -R $(id -u):$(id -g) Pods/RNAzureNotificationHub
+    pod update
   displayName: 'Install CocoaPods dependencies'
   workingDirectory: '../sample/ios'