Merge 2.7 into 3.0

Author: soyuka

CHANGELOG.md

@@ -155,6 +155,13 @@ Breaking changes:
 * Metadata: `Patch` is added to the automatic CRUD
 * Symfony: generated route names and operation names changed, route naming can be changed directly within metadata
 
+## v2.7.8
+
+### Bug fixes
+
+* [b15a97d7f](https://github.com/api-platform/core/commit/b15a97d7fa65ec78934e24a30289cb499d4365e7) fix(symfony): autoconfigure elasticsearch extension (#5376)
+* [cbe7355d1](https://github.com/api-platform/core/commit/cbe7355d184d75465a5e5acc51f9c4f24ab5b52c) fix(metadata): annotation reader should be nullable
+
 ## v2.7.7
 
 ### Bug fixes