Add compatibility mention

Author: danielbachhuber

_posts/2016-10-25-version-0.25.0.md

@@ -4,6 +4,13 @@ author: danielbachhuber
 title: Version 0.25.0 released
 ---
 
+### Compatibility with WordPress 4.7
+
+WordPress 4.7 introduces a new `WP_Hook` implementation for registering and executing actions and filters. Because WP-CLI has its own `WP_CLI::add_wp_hook()` that was erroneously accessing the `$wp_filter` global even when `add_filter()` was available, WP-CLI could fatal in certain circumstances. WP-CLI now appropriately calls `add_filter()` when it's available.
+
+**Importantly, due to the nature of these changes, WP-CLI versions prior to 0.25.0 will be incompatible with WordPress 4.7.**
+
+Inspect the nature of the change in [this pull request](https://github.com/wp-cli/wp-cli/pull/3384).
 
 ### Everything else in 0.25.0