Major version upgrade for Spring Cloud configuration provider and feature management libraries

A major version upgrade 2.x is now available for customers using the Azure App Configuration provider library in Spring Boot applications.

The new library version is redesigned to make it easier to use for Spring developers. For example, it has native integration for Spring profile support through leveraging the App Configuration label feature. Developers now have more flexibility to define what subset of configuration they want to load from an App Configuration store and under what conditions the configuration should be refreshed. The new version also added support for [push model configuration refresh]( https://docs.microsoft.com/azure/azure-app-configuration/enable-dynamic-configuration-java-spring-push-refresh) triggered by the Event Hub events. If you already use any of the previous 1.x versions, you can follow [this guidance to upgrade]( https://docs.microsoft.com/azure/azure-app-configuration/howto-convert-to-the-new-spring-boot) to 2.x. If you are a new user, please check out [this quickstart]( https://docs.microsoft.com/azure/azure-app-configuration/quickstart-java-spring-app). For a complete list of all changes, reference the [release notes]( https://github.com/Azure/AppConfiguration/blob/main/releaseNotes/AzureSpringCloudAppConfigurationConfig.md).

A new 2.x version of the feature management library for Spring Boot applications is also released. Besides bug fixes, it added the long-awaited feature rollout support. Please check out the [release notes]( https://github.com/Azure/AppConfiguration/blob/main/releaseNotes/AzureSpringCloudFeatureManagement.md) for more information, or follow the [quickstart](https://docs.microsoft.com/azure/azure-app-configuration/quickstart-feature-flag-spring-boot) to leverage App Configuration for your next feature release.

As always, please feel free to [let us know](https://github.com/Azure/AppConfiguration/issues/new) if you have any feedback.