PHP minor version update for November 2018

In November 2018, Azure App Service will update the PHP stacks to the latest available versions. For information on the changes in the new versions, please see the change logs on the PHP website. | PHP version | Change log | | ----------- | ---------- | | 5.6.38 | | | 7.0.32 | | | 7.1.22 | | | 7.2.10 | | * Features * SDK and Tools