Merge pull request #4165 from morozov/deprecate-wrapper-as-driver

Deprecated usage of wrapper components as implementations of driver-level interfaces

UPGRADE.md

 # Upgrade to 2.11
 
+## Deprecated usage of wrapper-level components as implementations of driver-level interfaces
+
+The usage of the wrapper `Connection` and `Statement` classes as implementations of the `Driver\Connection` and `Driver\Statement` interfaces is deprecated.
+
 ## Deprecations in the wrapper `Connection` class
 
 1. The `executeUpdate()` method has been deprecated in favor of `executeStatement()`. 
@@ -8,7 +12,7 @@
 
 ## PDO-related classes outside of the PDO namespace are deprecated
 
-The following outside of the PDO namespace have been deprecated in favor of their counterparts in the PDO namespace:
+The following PDO-related classes outside of the PDO namespace have been deprecated in favor of their counterparts in the PDO namespace:
 
 - `PDOMySql\Driver` → `PDO\MySQL\Driver`
 - `PDOOracle\Driver` → `PDO\OCI\Driver`